Pollination with the help of snails is called.
Pollination is processed by the agent which transfers pollen from the pollen sac or anther to the stigma or ovule in the flower. Pollination done by snails is called malacophily. Such type of flowers is called as malacophilous. These flowers achieve pollination only by the help of snails and slugs.
Thus, the correct answer is malacophily.
Correct option is B.