The compound which causes antidepressant action on the central nervous system is

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Butylated hydroxy anisole when added to butter increases its shelf life.
Reason $R$: Butylated hydroxy anisole is more reactive towards oxygen than food.
In the light of the above statements,choose the most appropriate answer from the options given below:

The compound shown in the image is used as:

Which of these is a hypnotic?

Which of the following is used to treat tuberculosis?

Which of the following substances is a germicidal detergent?