Question

The number of species from the following that have pyramidal geometry around the central atom is_____

\(S_2 O^{2-}_3 ,SO ^{2-}_4 , SO ^{2-}_3 , S_2 O ^{2-}_7\)

(1) 4 

(2) 3 

(3) 1 

(4) 2

Answer 1

Correct option is (3) 1