**Solution to Question in ‘Tackle Options in GMAT DS Questions the Oak’s Academy Way’ Blog Post**

**Question:**

*Given that a, b, c, d, e are positive integers and that ‘b’ is an odd integer, is the product (a+b)(a+c)(a+d)(a+e) an odd integer?*

*(1) a is an odd integer*

*(2) c is an even integer*