Trying to tease Birbal, Akbar gave him one gold coin and ask him to buy
* something for him to eat
* something for him to drink.
* something to feed the cows
* something to plant in the garden
and most important you need to buy only one thing.

What must birbal buy to silence Akbar?

Watermelon
* something for him to eat - watermelon
* something for him to drink - juice of watermelon
* something to feed the cows - Watermelon rinds
* something to plant in the garden - the seeds of watermelon