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The figure shows the motion of a planet around the sun in an elliptical orbit with sun at the focus. The shaded areas A and B are also shown in the figure which can be assumed to be equal. If 1 t and 2 t represent the time for the planet to move from a to b and d to c respectively, then

1. 2 1 t t 
2. 2 1 t t 
3. 2 1 t t 
4. 2 1 t t 

Correct answer: 2 1 t t 

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