Complex no

Ansi


@NishantThakre can you do it by any other process like using rationalization

@PratimeJaiswal
2nd technique
while giving exam if it does not strike how to solve the question you should go through options
You have freedom to select values of a and b according to the condition a^2+b^2=1
First take a=1 b=0 option c and d gets eliminated
Then take a=0 b=1 option B gets eliminated
You should develop this habit for solving questions quickly in mains
But my observation says that this tricks very rarely worked for previous year questions of advanced

@PratimeJaiswal
Using rationalization