49.(a)
$\begin{align*}
&LHS : \quad \forall \left ( P(x) \rightarrow A \right ) \qquad | \quad RHS : \quad \qquad \exists P(x)\rightarrow A \\
\\
&\text{When A is } 1 \text{ or true , then LHS and RHS both sides are true , irrespective of } \;\; \exists \text{ and } \forall \\
\\
&\text{When A is } 0 \text{ or false , then LHS is True when all }P(x_i) \text{ are False} \\
&\text{In the same case : RHS is true when } \exists P(x) \text{ is false or, there is no such } \\
&x_i \text{ such that }P(x_i) \text{ is true : basically the same requirement as above}
\end{align*}$