Answer will be C.
first convert Km/hrs into Km/min.then X speed will be 4/6 and speed of Y will be 11/12.(just divide by 60)
After 15 min-
X will cover 10km.
Now at this time instant distance between X and Y will be 140.
Lets suppose at time instant X they both meet.
so equation will be
$\tfrac{4}{6}x=M$
$\tfrac{11}{12}x=140-M$
When we solve this question x(time) will be= $\tfrac{1680}{9}$
When we calculate distance covered by X in time we will get=58.947.
Total distance covered by x=58.947+10=68.947KM
Total distance covered by Y=81.052.
Distance of Y from Pune=150-81.052=68.94KM
So Answer will be C.