Which of the following ions contains lone pair of electrons at the central atom?

Question

A) SO4 2-
B) NO3 -
C) IO3 -

(Is there any ways without drawing the diagrams and I could still able to figure out the answer???)

Thx very much

Answer 1

No. As far as I know the Lewis Structure must be drawn.
I would look at IO3^- as the culprit.