Pollen grains in wind-pollinated flowers are:

The correct answer is Option (1) → Light weight and non sticky

In wind pollination, pollen must float in the air and travel with air currents. Reaching a stigma is a matter of chance, so the pollen has to be light and must not stick together.

(1) Light weight and non sticky — Correct. Light pollen stays in the air for long. Non-sticky pollen grains stay separate, so the wind can carry each one far. Wind-pollinated flowers also make a very large amount of pollen to make up for the loss.

(2) Ribbon like — Incorrect. Long, ribbon-like pollen grains are found in water-pollinated sea-grasses such as Zostera. They are carried inside the water, not by wind.

(3) Heavy weight and sticky — Incorrect. These features are reversed. Heavy, sticky pollen is typical of insect-pollinated flowers, where the pollen sticks to the body of the insect.

(4) Mucilage covered — Incorrect. A mucilage cover protects pollen grains from getting wet. It is seen in water-pollinated plants, not in wind-pollinated ones.

NCERT Extract:
Pollination – …