Write in Terms of I $\sqrt { - 4 }$ A) $\pm 2$

Multiple Choice

Write in terms of i.
- $\sqrt { - 4 }$

A) $\pm 2$
B) $- 2 \mathrm { i }$
C) $2 \mathrm { i }$
D) $- \mathrm { i } \sqrt { 2 }$