Out of the given options, three are similar in a

Which of the following gases was released into the atmosphere during Bhopal gas tragedy? 

Which catalyst is used for the synthesis of H₂ SO₄  by Lead-Chamber process?

Which among the following is an example of a point mutation?

Given below are two statements :

Statement I :

Whisky, brandy and rum are produced without distillation of the fermented broth.

Which organ is known as the "Biochemical Laboratory" of the human body?

The scientific name of vitamin B12 is:

Respiration occurs in which part of the cell?

Which pair of biotechnological products and their sources is correct?

Extra number of which chromosome is responsible for Down’s syndrome (Mongoloid Idiot) in man.