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(B) $1$. Autogamy is genetically equivalent to self-pollination,not xenogamy. Thus,this statement is False $(F)$.$2$. In grasses,pollination is anemop

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$FTTF$

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(B) $1$. Autogamy is genetically equivalent to self-pollination,not xenogamy. Thus,this statement is False $(F)$.$2$. In grasses,pollination is anemophilous (wind-pollinated),which is common. Thus,this statement is True $(T)$.$3$. The placenta is indeed arranged on the inner wall of the ovary,which is the definition of placentation. Thus,this statement is True $(T)$.$4$. Pollen grains can be stored in liquid nitrogen at $-196^oC$ (cryopreservation),not $-100^oC$. Thus,this statement is False $(F)$.Therefore,the sequence is $F, T, T, F$,which corresponds to option $B$.

Choose the correct options for the following statements:
$1$. Autogamy is genetically xenogamy.
$2$. Pollination occurs by air in grass.
$3$. Placenta is arranged in the inner wall of the ovary.
$4$. It is possible to store pollen grains in liquid nitrogen at $-196^oC$.

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Choose the correct options for the following statements:$1$. Autogamy is genetically xenogamy.$2$. Pollination occurs by air in grass.$3$. Placenta is arranged in the inner wall of the ovary.$4$. It is possible to store pollen grains in liquid nitrogen at $-196^oC$.