What is the speed of the train? I. The train crosses a tree in 13 seconds. II. The train crosses a platform of length 250 metres in 27 seconds. III. The train crosses another train running in the same direction in 32 seconds.

• I. The train crosses a tree in 13 seconds.
• II. The train crosses a platform of length 250 metres in 27 seconds.
• III. The train crosses another train running in the same direction in 32 seconds.
• A. I and II only
• B. II and III only
• C. I and III only
• D. Any two of the three
• E. None of these