WBJEE 2014 Maths Solved Paper

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Question : 25 of 80

Marks: +1, -0

Let Ι denote the 3 × 3 identity matrix and P be a matrix obtained by rearranging the columns of I. Then

(A) There are six distinct choices for P and det(P) = 1
There are six distinct choices for P and det(P) = ± 1
There are more than one choices for P and some of them are not invertible
There are more than one choices for P and P−1 = I in each choice

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