The correct option is D 0.65
Weight of rice = 200 g
Weight of wheat = 450 g
To add the given numbers, make the units same.
200 g + 450 g = 650 g
Now, convert g to kg.
1 g = 11000 kg
650 g = 6501000 = 0.65 kg
Hence, the total weight of rice and wheat is 0.65 kg.