Which of the Following Particle Reactions Cannot Occur?
A)p $\rightarrow$ P + P + P

Which of the following particle reactions cannot occur?

A) p + p $\rightarrow$ p + p + p + $\overline{p}$
B) p + $\overline{p}$$\rightarrow$ 2 $\gamma$
C) $\pi$ ⁺ + p $\rightarrow$ K⁺ + $\pi$ ⁺
D) $\gamma$ + p $\rightarrow$ n + $\pi$ ⁰
E) e ^- + e⁺ $\rightarrow$ 2 $\gamma$