Let $L = \{a^mb^nb^kd^l (n+k) \text{ is odd only if } m = l; m, n, k, l > 0\}$. Which of the following is true about $L$? $L$ is CFL but not DCFL $L$ is regular but not CFL $L$ is DCFL but not regular None of these

Is the following two languages regular? L = { $w$ | the number of occurrences of $'01'$ in $w$ is equal to the number of occurrences of $'10'$} Late(L) = {$x\in \Sigma^*$ : for some $a\in \Sigma$, string $ax\in L$ where $L$ is regular} (A) Only $I$ (B) Only $II$ (C) Both $I$ & $II$ (D) Neither $I$ nor $II$