When day and night are equal?

(A) 23rd February and 21st September
(B) 21st March and 23rd September
(C) 23rd March and 21st September
(D) None of these

The answer is: (B) 21st March and 23rd September
The equinoxes occur in March (about 21st March) and September (about 23rd September). On these two days, the Sun is exactly above the Equator that makes day and night of equal length.

In fish liver oil, there is:

(A) Vitamin A only
(B) Vitamin D only
(C) Vitamin A and Vitamin E
(D) Vitamin A and Vitamin D

The answer is: (D) Vitamin A and Vitamin D
In fish liver oil, there is Vitamin A and Vitamin D.