Winged pollen grains are present in

Solution & Explanation

Answer: (D) Pinus. Solution: Winged pollen grains (where the outer exine extends into two lateral bladder-like wings that aid wind dispersal) are a feature of the conifer Pinus, a gymnosperm whose pollen is released from the microsporangium and carried by air currents. Mango and mustard are angiosperms and Cycas (though a gymnosperm) does not bear winged pollen, so only Pinus is correct. NCERT notes that the gymnosperm pollen grain is the reduced male gametophyte released from the microsporangium and carried in air currents — consistent with the wind-borne winged pollen of Pinus. NCERT Reference: Class XI Biology, Plant Kingdom, p.33, lines 35-38 — "The pollen grain is released from the microsporangium. They are carried in air currents and come in contact with the opening of the ovules borne on megasporophylls".