question_answer

A brief information about a few elements is given below:

P: It is used in making electrodes.

O: It is required for combustion.

R: It is used to preserve food.

S: It is used as fungicide.

P, Q, R and S are respectively

 

A) Aluminium, carbon, oxygen and phosphorus

B) Copper, oxygen, hydrogen and iodine

C) Carbon, oxygen, nitrogen and sulphur

D) Sulphur, oxygen, nitrogen and hydrogen.