Write the Equation in Exponential Form $\log _ { 1 / 2 } 4 = - 2$

Multiple Choice

Write the equation in exponential form.
- $\log _ { 1 / 2 } 4 = - 2$

A) $( - 2 ) ^ { 1 / 2 } = 4$
B) $\left( \frac { 1 } { 2 } \right) ^ { - 2 } = 4$
C) $\left( \frac { 1 } { 2 } \right) ^ { 2 } = 4$
D) $4 ^ { 1 / 2 } = 2$