In the Proton-Proton Cycle, the Helium Atom and Neutrino Have

Multiple Choice

In the proton-proton cycle, the helium atom and neutrino have less mass than the originalhydrogen. What happens to the "lost" mass?

A) It is recycled back into hydrogen.
B) It is ejected into space.
C) It is converted to energy.
D) It is transformed into electrons.
E) Conservation of mass dictates no mass can be lost.