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Pollen-pistil interaction determines the compatibility of pollen grains.

Most of the plants prefer self pollination over cross pollination

Pollination does not guarantee transfer of the right type of pollen.

Interactions between pollen and pistil are chemically mediated.

answer is B.

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Detailed Solution

Pollen pistil interaction determines whether the pollen grain is suitable for carrying out fertilization.

Most of the plants prefer cross pollination over self pollination.

There is no guarantee of compatible pollens landing on the stigma. Factors like wind, animals, birds, insects, etc. affects pollination.

The pistil has ability to recognize compatible pollens and reject incompatible ones. Pistil and pollens interact with each other with the help of chemicals, just like hormones.

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