Match the following.
a) valence of group IA — i) 4
b) valence of group IVA — ii) 0
c) valence of group VIA — iii) 1
d) valence of group VIIIA — iv) 2
A) a → i, b → ii, c → iii, d → iv
B) a → iv, b → iii, c → ii, d → i
C) a → iv, b → i, c → ii, d →iii
D) a → iii, b → i, c → iv, d → ii