Verified Answer :

jtvatsim

Hmm... this one is interesting, let me try by making sure we're thinking the same thing:

You're question looks like this?
\(\sqrt{\sqrt{-x}}\)

sqrt(-x) is pure imaginary. It will be in the form +√x i and -√x i
And the square root of +√x i and -√x i are in the format X+iY and X-iY

So the answer is c) complex

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