Correct Answer - A
The situation is shown in figure.When Joy shouted, the sound which is going directly toward Kim will not reach her as due to wind drift is added to it.The sound which is going in the direction at an angle `theta`,to their line joining will reach to Kim as when drift is added to it as shown in figure, the resultant is in the direction of their line joining.
The resultant velocity of sound is `v_(R)=sqrt(v^(2)-u^(2))`
Time taken by sound to reach Kim is `t=x/sqrt(v^(2)-u^(2))`