A proton is annihilated when it interacts with which one or more of the following particles?
A) An electron.
B) A neutron.
C) An antineutron.
D) An antiproton.

Question

Quizplus · Accepted Answer

A proton can be annihilated only when it interacts with an antiparticle. In this case, the antiproton is the antiparticle that can annihilate a proton. Options A, B, and C involve particles that are not antiparticles and hence cannot cause annihilation with a proton.

A Proton Is Annihilated When It Interacts with Which One