i like this....
Well, I started with B, then moved to D. I guess B is right.
(1) 3 * sqrt(1/9) = 1 = odd, but 1/9 ^ 3 is not odd
OA is B.
i) If x is an odd integer, then X^3 is odd integer. but, if x = 1/9, then X^3 is (1/3)^3 or 1/27, which is not even an integer. so not suff...
ii) it is clearly suff.
So B is correct..