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A rectangle with sides of lengths (2 n-1...

A rectangle with sides of lengths (2 n-1) and (2 m-1) units is divided into squares of unit lengths. The number of rectangles which can be formed with sides of odd length is

A

1: `m^(2) n^(2)`

B

2: `m n(m+1)(n+1)`

C

3: `4^(a+a)-1`

D

4: none of these

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The correct Answer is:
A
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