A brief information about a few elements is given below:
P : lt is used in making electrodes
Q : lt is required for combustion.
R : lt is used to preserve food.
S : lt 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.
