Let $p = \lim \limits_{x \to 0+} (1+ \tan ^2 \sqrt x )^{1/2x}$ then long p is equal to

Question

$\begin{array}{1 1}(1)2 \\(2) 1 \\ (3) \large\frac{1}{2}\\ (4) \large\frac{1}{4} \end{array} $