Member countries of NATO are:

(A) 20 Countries
(B) 25 Countries
(C) 30 Countries
(D) 35 Countries

Answer: (C) 30 Countries
Currently member countries of NATO are 30.

Acid rain contains:

(A) Nitric acid
(B) Sulphuric acid
(C) Both A and B
(D) None of these

Answer: (C) Both A and B
Acid rain contains Nitric acid and sulphuric acid.