Question Discussion & Solution

The correct answer is option 1.

Concept:

Weak entity set :

A weak entity set is an entity set that does not contain sufficient attributes to uniquely identify its entities. In other words, a primary key does not exist for a weak entity set. However, it contains a partial key called a discriminator. Discriminators can identify a group of entities from the entity set.

ER diagram:

This ER diagram illustrates key information about the book, including entities such as author, Publisher, books, and Edition. It allows for understanding the relationships between entities.

Author:

For an author, the book dealer might want to keep track of the name (first, middle, and last), date of birth, and date of death.​

Publisher: 

For a Publisher, the book dealer might want to keep track of the phone, name, and address.

Book:

For a book, the book dealer might want to keep track of the id, title, and date.

Edition:

For an edition, the book dealer might want to keep track of the name and the total number of copies.

Relation ER diagram,

• The author can write a number of books and each number of books has many numbers of authors. So it has many to many relationships.
• The book can publish at most one publisher and each number of publishers has many numbers books. So it has many to one relationship.
• The book can has atmost one edition and each number edition has many numbers of books. So it has many to one relationship.

The ER diagram,

Here Edition is a weak entity because it can not have candidate key attributes.​

Hence the correct answer is Edition.

Concept-

• Roots are the underground structures that help in the absorption of water and minerals, provide a proper anchorage to the plant parts, storage of reserve food material (Carrot, Radish), and synthesis of PGR (plant growth regulators).
• Sometimes roots get modified to perform different functions like Storage of food, respiration, climbing, etc.
• These types of roots are called modified roots.

Explanation-

• The Coralloid roots are the specialized roots found in cycas, these roots exhibit a symbiotic relationship between the cyanobacteria and cycas where the cyanobacteria fix the nitrogen and in return, the cycas provide a stable environment to live.
• Cycas, a genus of 105 species of palmlike tropical and subtropical ornamental cycads (family Cycadaceae), among them trees 12 meters (40 feet) or more in height. 
• Their leaves are dark green and circinate (uncoiling as fern leaves do), differing from those of other members of the family in having a midrib but no lateral veins. 
• The seeds are borne along the margins of modified leaves, which are arranged in a whorl at the top of the trunk, rather than in compact cones. 

Thereby coralloid roots are found in cycas.

Additional Information

• Lycopodiopsida
  • It is a class of herbaceous vascular plants known as lycopods, lycophytes.
  • Members of the class are called clubmosses, firmosses, and quillworts.
• Pine
  • A pine is any conifer in the genus Pinus of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.
• Dryopteris
  • It is commonly called the wood ferns, male ferns, or buckler ferns is a fern genus in the family Dryopteridaceae.​

The correct answer is Anirudh Singh.

Key Points

• Anirudh Singh-
  • He was the 15th king of Bundi state.
  • He was married to Rani Nathawat Ji.
  • He built 84 pillared cenotaphs, for his beloved nurse Deva.
  • He served Aurangzeb in the Deccan.
  • He was later transferred to the northwest under Prince Muazzam.

Additional Information

•  Surajmal-
  • He was the son of Narayan Das.
  • He killed Rana Sanga's elder son Ratan Singh at Aheriya festival.
• Ratan Singh-
  • He was made king of Bundi after Rav Bhoj.
  • Jahangir gave Ramraj title to him.
  • Due to Ratan Singh's painting love, Jahangir gave him Sir Bundray's title.
  • In his reign, Kota was separated from the Bundi state by Shahjahan.
• Veer Singh-
  • He built the Taragarh fort in Bundi.
  • Maharana Lakha attacked him.
  • Mahmood Khilaji attacked him three times

Pages are necessary part of book. Book can be fiction or non-fiction. Pictures are not always necessary and not all books have learning. So, all other options are not necessary except Pages.

A group of sheep referred to as a flock. Similarly, a group of fish is called shoal.