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(D) The period for which pollen grains remain viable is highly variable and depends on the prevailing temperature and humidity. In some cereals such a

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Rosaceae; Leguminosae

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(D) The period for which pollen grains remain viable is highly variable and depends on the prevailing temperature and humidity. In some cereals such as rice and wheat,pollen grains lose viability within $30$ minutes of their release. In contrast,in some members of the families $Solanaceae$,$Rosaceae$,and $Leguminosae$,pollen grains maintain their viability for several months. Therefore,among the given options,the pair $Rosaceae$ and $Leguminosae$ correctly represents families where pollen grains can remain viable for months.

In some members of which of the following pairs of families,pollen grains retain their viability for months after release?

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