Correct Answer - B
`**` The pollen tube enters the ovule through micropyle is called porogamy (Lily). Porogamy is most common.
`**` If pollen tube enters the ovule through chalaza, it is called chalazogamy or basigamy (Casurina).
`**` If pollen tube enters the ovule through integument it is called mesogamy (Cucurbita, Populus).