Solve this;
Q.51. If Z 1 0   a n d   Z 2 be two complex numbers such that Z 2 Z 1 is a purely imaginary number, then 2 Z 1 + 3 Z 2 2 Z 1 - 3 Z 2 is equal to:
(A) 2
(B) 5
(C) 3
(D) 1

  • -2
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