What happens in electron capture?

What happens in electron capture?

• A. A proton captures an inner orbital electron turning into a neutron and emitting a neutrino; Z decreases by 1.
• B. A neutron decays into a proton, emitting an electron and an antineutrino.
• C. Protons convert to positrons with gamma emission.
• D. The nucleus emits a beta particle and increases Z by 1.

Answer: (A)