Definition: You are given a question on high school chemistry. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Each resonance form of the nitrate ion, NO3-, has how many sigma and how many pi bonds?
(A)1 sigma and 2 pi (B)2 sigma and 1 pi (C)1 sigma and 1 pi (D)3 sigma and 1 pi

D