What Is the Q of the Reaction P + P $\rarr$

Multiple Choice

What is the Q of the reaction p + p $\rarr$ p + p + $\pi$ ⁰? The rest mass of the proton is 938 MeV/c² and of the neutral point is 135 MeV/c².

A) 187 MeV
B) 135 MeV
C) 938 MeV
D) -187 MeV
E) -135 MeV