Question Discussion & Solution

• A mistake is essentially any programmer action that later shows up as an incorrect result during program execution
• A programmer may commit a mistake in almost any development activity; For example, during coding a programmer might commit the mistake of not initializing a certain variable or might overlook the errors that might arise in some exceptional situations such as division by zero in an arithmetic operation, both these mistakes can lead to an incorrect result

The correct answer is Folk Dance.

Key Points

• Dancer Kalbelia Gulabo Sapera's tale is one of perseverance in the face of societal pressure.
• Gulabo was awarded the Padma Shri in 2016 for his efforts to popularise Rajasthan's Sapera dance tradition, which he has promoted in over 165 countries.
• She was a participant in the recently concluded Jaipur Literature Festival 2021, a woman whose storey is worth hearing.
• Gulabo's indomitable spirit protected her from a destiny that regularly befalls girl children in the nomadic group of kalbelias, an abjectly poor population on the outskirts of civilization.

Important Points

• Kalbelia is a snake-charming tribe from Rajasthan, India's the Thar Desert.
• Men and women both do dance, which is an important element of their culture.
• The Daliwal and Mewara are the two main groups of Kalbelias. In ancient times, the Kalbelias were known to wander about a lot.
• Catching snakes and trading snake venom is their traditional occupation.

Explanation:

• One of the most important contributors to the early construction of the periodic table was Russian scientist Dmitri Ivanovich Mendeléev.
• Mendeleev Periodic Table was introduced in 1869, following the rejection of Newlands Octave Law.
• Elements were arranged in Mendeleev's periodic chart according to their fundamental property, atomic mass, and chemical characteristics.
• Only 63 elements were known at Mendeleev's time.
• Mendeleev discovered that the properties of elements are the periodic function of their atomic mass in a periodic pattern after analysing their qualities.
• He ordered the elements in the periodic table so that those with comparable properties were in the same vertical columns.
• He developed a periodic law based on this finding, which states:- “The periodic function of an element's atomic mass is its property.”
• Demerits -  
  1. He couldn't find hydrogen in the periodic chart.
  2. Moving from one element to the next caused an irregular increase in atomic mass. As a result, the amount of elements that have yet to be identified is unpredictable.
  3. Isotopes were not considered. Later on, isotopes of elements that defied Mendeleev's periodic law were discovered.​ 

Additional Information

Mendeleev left places for undiscovered elements. 

• scandium, gallium and germanium, discovered later, have properties similar to Eka–boron, Eka–aluminium and Eka–silicon, respectively. So undiscovered elements were named also by Mendeleevs. 
• It was not very strictly based on increasing order of atomic mass.  For example, cobalt (atomic mass 58.9) appeared before nickel (atomic mass 58.7) based on periodic properties. 
• Noble gases can easily get adjusted in Mendeleev periodic table even they were discovered after the periodic table. 

The logic here is

The Opposite letter of first letter is third letter.

Second letter + 1 = third letter

Option 1 : DVW

Option 2 : GST

Option 3 : JPQ

Option 4 : MNK

From the above options 1, 2 and 3 follow the same logic and option 4 does not follow the same logic.

Hence, "MNK" is the answer. 

Foot, Mile and Light year are unit of Length except Distance.