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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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1999
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Q)
The least positive integer $n$ such that $\begin{pmatrix} \frac{1 - i}{1+i} \end{pmatrix}^{2n} = 1$ is :
( A ) 14
( B ) 4
( C ) 2
( D ) 6
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