[问答题]
Which of the following decays are possible? For to9p9cdhydwsp/ uxl3a b.. 05khose that are forbidf75rejk /m4vz,i+j p k buqo2uf5fo -*den, explain whicheqvrbpmi4kj/f o+,*u fu -okjz55f7 2 laws are violated.
(a) $\Xi^0 \to \Sigma^+ + \pi^-$
(b) $\Omega^- \to \Sigma^+ + \pi^- + \nu$
(c) $\Sigma^0 \to \Delta^0 + \gamma + \gamma$
