The correct option is B Sugar and Wheat
To balance the weight of 900 g of rice, we need items whose weights add up to 900g.
Sugar and Tea: 250 g + 50 g = 300 g
Sugar and Wheat: 250 g + 650 g = 900 g
Wheat and Black pepper: 650 g + 50 g = 700 g
Tea and Wheat: 50 g + 650 g = 700 g
Thus, Ram should use sugar and wheat on one pan and 900 g of rice on the other so that the pans balance.