When the Following Equation Is Balanced Using the Smallest Possible $\rightarrow$

When the following equation is balanced using the smallest possible integers, what is the number in front of the substance in bold type? NBr₃ + NaOH $\rightarrow$ N₂ + NaBr + HOBr

A) 1
B) 2
C) 3
D) 4
E) 5