Answer
$L_e$ conservation law is violated.
The spin angular momentum conservation law is not conserved.
Work Step by Step
The $\mu^-$ has $L_e = 0$
The $e^-$ has $L_e = -1$
The $\nu_\mu$ has $L_e = 0$
Therefore, $L_e$ conservation law is violated.
The $\mu^-$ has spin $\frac{1}{2}$
The $e^-$ has spin $\frac{1}{2}$
The $\nu_\mu$ has spin $\frac{1}{2}$
Therefore, the spin angular momentum conservation law is not conserved.
