To solve this problem, we need to identify which plant has winged pollen grains. Let's analyze each option:$\newline \bullet$Mango:$\newline$ - Mango (Mangifera indica) is a flowering plant in the family Anacardiaceae.$\newline$ - It does not have winged pollen grains.$\newline \bullet$Cycas:$\newline$ - Cycas is a genus of gymnosperms in the family Cycadaceae.$\newline$ - It has large, non-winged pollen grains.$\newline \bullet$Mustard:$\newline$ - Mustard (Brassica species) is a flowering plant in the family Brassicaceae.$\newline$ - It does not have winged pollen grains.$\newline \bullet$Pinus:$\newline$ - Pinus is a genus of gymnosperms in the family Pinaceae.$\newline$ - It is known for having winged pollen grains, which help in wind dispersal.$\newline$Therefore, the correct answer is Option 4: Pinus, as it has winged pollen grains.