Which of the following is equivalent to...?

Answer:
B. [tex]\sqrt{16}\ *\ \sqrt{4}[/tex]
Step-by-step 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 =)