Question Discussion & Solution

The correct answer is Rock Phosphate.

Key Points

• Jhamar Kotra mines are the largest reserve of phosphate in India.
• Jhamar Kotra huddled in the Aravali range in the southern part of Rajasthan.
• It is situated in the Udaipur district of Rajasthan.
• It is only the commercially exploitable rock phosphate deposit in the country.

Additional Information

• Minerals in production of which Rajasthan holds the monopoly in the country are
  • Lead and Zinc ores
  • Selenite 
  • Wollastonite 
  • Garnet​
• Rajasthan is a leading producer of Calcite, Gypsum, Bal Clay, Feldspar, Rock phosphate, Stealite, Red ochre.

• Rajasthan is the sole producer of Lead & Zinc (Pb & Zn), Selenite and Wollastonite.
• Rajasthan is also called Mineral's Museum.
• Rajasthan has 2nd position in terms of minerals availability.
• The almost entire production of Silver, Calcite and Gypsum in the country comes from Rajasthan.
• Rajasthan is also the leading producer of Ball Clay, Phosphorite, Ochre, Steatite, Felspar and Fire Clay in the country. 

The correct answer is Operating system.

Key Points

• UBUNTU is an example of an operating system.
• The operating system is a collection of programs that controls the overall operations of the computer.
• Operating systems are of two types namely, Open-source operating systems and Closed source operating systems.
• UBUNTU is free and open-source software.
• Operating systems works as an interface between a user and computer hardware components.
• Examples of operating systems are:
  • Linux
  • Unix
  • DOS
  • Windows
  • Ubuntu
  • Embedded operating system
  • OpenBSD
  • Mac OS

Additional Information

• Malware is a file or code that is designed to damage and destroy computers and computer systems.
  • Viruses, worms, Trojan viruses, spyware are the common examples of malware.
• A web browser is an application used to access and view websites.
  • Google Chrome, Mozilla Firefox, Apple Safari are the common examples of web browsers.

The correct answer is Sulphur.

• The sulphur is the eye irritating compound that is released when cutting onions.
• The syn-Propanethial-S-oxide is the chemical irritant produced by an onion.
• This chemical stimulates the eyes' lachrymal glands which release tears.
• Previously scientists used to blame enzyme alinase for the instability of substances in a cut onion.
• In 2002, a study in Japan proved that lachrymatory factor synthase is responsible for irritation of the eyes.

According to the question:

Since 7 is the part of the men as well as the women.

So, 7 men are women.

Hence, 7 is the correct answer. 

Note: If in the question asked "how many men are only women", then the answer, in this case, would be 0.

(E_Name, Salary_in_Lakhs) is the key

(E_Name, Salary_in_Lakhs) → {E_ID, E_Age, E_mail}

E_Name: Nitesh is repeated

Check only for Nitesh

(Nitesh, 9) → (XE005, 24, nitestSE@123)

(Nitesh, R) → (XE023, 24, nitestCE@123)

Since right hand side is not same

Therefore, R cannot be equal to 9