Answer
a. Charge and strangeness.
b. Energy.
c. Baryon number, strangeness, spin.
Work Step by Step
a.
Conservation of charge is violated: $0 \neq 0 + (-1)$.
Conservation of strangeness is violated: $-1 \neq 0 + 0$.
b.
Conservation of energy is violated:
$$1115.7 MeV/c^2 \lt 938.3 MeV/c^2+493.7 MeV/c^2$$
c.
Conservation of baryon number is violated: $1 \neq 0 + 0$.
Conservation of strangeness is violated: $-1 \neq 0 + 0$.
Conservation of spin is violated: $\frac{1}{2} \neq 0 + 0$.
