Correct option (B) ((m + 1)(n + 1)/4)2
Number of ways of selecting a side of odd length along the side of m units
m + (m - 2) + (m - 4) + ....3 + 1 = 1/2(m + 1/2)(m + 1) = (m + 1)/5\
Similarly, number of ways of selecting a side of odd length along the side of n units = (n + 1)2/4
Hence, the total number of ways