Write in Exponential Form $\log \pi\left(\pi^{7}\right)=x$ A) $\{7\}$ B) $\left\{7^{3}\right\}$ C) $\{3\}$ D) $\{37\}$

Write in exponential form.
- $\log \pi\left(\pi^{7}\right) =x$

A) $\{7\}$
B) $\left\{7^{3}\right\}$
C) $\{3\}$
D) $\{37\}$