Verified Answer :

The correct answer for this question is this one: "d) -1-2i" Any complex number with a negative real part and positive imaginary part. It has to be of this form, 
a+bi so that a<0 and b>0.
Here are the following choices:
a)4i
b)2-4i
c) 4i-1
d) -1-2i

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