how do I find the following points that most closely represent the square root of negative 52

A) j
1) In this question, we have -√52 that is to say, the same thing as √52 multiplied by -1.
So, since √52= 7.211 if we multiply that by -1 we'll have -7.2111
2) Examining the options, alternative A =j it's the closest to -7.211 apparently