JEE Main Physics question

A man drops a ball downside from the roof of a tower of height 400 m. At the same time another ball is thrown upside with a velocity 50 m/s from the surface of the tower, then they will meet at which height from the surface of the tower

• (A)100 m
• (B)320 m
• (C)80 mCorrect
• (D)240 m