A) A neutrino
B) An antineutrino
C) An alpha particle
D) A beta particle
Correct Answer: B
Solution :
\[_{0}{{n}^{1}}{{=}_{1}}{{p}^{1}}{{+}_{-1}}{{e}^{0}}+\bar{\nu }\] Antineutrino is required for conservation of spin.
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