Given, when 5 percent is lost in grinding wheat, the country has to import 20 million bags to make up of the loss,
5\(\%\) of wheat = 20 million bags ......(1)
When only 2 percent is lost, it has to import 15 million bags,
2\(\%\) of wheat = 15 million bags ......(2)
From equation (1) and (2)
3\(\%\) of wheat = 5 million and 100\(\%\) \(=\frac{500}{3}=166\frac{2}{3}\)
Hence, option D is the correct answer.The correct option is (D): \(166\frac{2}{3}\)