The First Step in the Ostwald Process for Producing Nitric $\rarr$

Multiple Choice

The first step in the Ostwald process for producing nitric acid is
4NH₃(g) + 5O₂(g) $\rarr$ 4NO(g) + 6H₂O(g) .
If the reaction of 150.g of ammonia with 150.g of oxygen gas yields 87.g of nitric oxide (NO) , what is the percent yield of this reaction?

A) 100%
B) 49%
C) 77%
D) 33%
E) 62%