Two aeroplanes fly from their respective position ‘A’ and ‘B’ starting at the same time and reach of point ‘C’ (along straight line) simultaneously when wind was not blowing. On a windy day they head towards ‘C’ but both reach the point ‘D’ simultaneously in the same time which they took to reach ‘C’. Then the wind is blowing in :

Options

A. North-East direction
B. North-West direction
C. Direction making an angle `0 lt theta lt 90` with North towards West.
D. North direction

Answer

B