Answer:
B.
![√(16)\ *\ √(4)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/z7ayzz28xp14g38p92o9aat25l0bafq0gc.png)
Explanation:
A. is not correct
The square root of 16*4 is 8, so C and D are not correct.
If two numbers are multiplied inside a radical, then they can be two separate radicals multiplied by each other.
The answer is B.
I really hope this helps =)