**Concept: The question tests on the area of Number Properties**

**Solution:**

The product of 2 even numbers or the product of an even and an odd number is always even.

The product of 2 numbers can be odd only if both are odd.

Therefore m and n are odd numbers.

For 2 Odd numbers (Considering that the final answer is an integer)

(i) Odd + Odd = Even

(ii) (Odd - Odd) = Even

(iii) Odd / Odd = Odd

Therefore m - n will result in an odd number.

**Option B**