Question

A rectangle with sides 2m–1, 2n–1 is divided into squares of unit length by drawing lines parallel to sides of a rectangle. The number of rectangles with odd side length is

(a) (m + n + 1)²

(b) mn(m + 1)(n + 1)

(c) m² n²

(d) 4^m+n–1

Answer 1

Correct option is (c) m² n²