The correct option is
C (a)- (4), (b)- (1), (c)- (2), (d)- (3)
Zoophily is the form of pollination in which pollination occurs by animals such as hummingbirds, bees, monkey, rodents, etc. Zoophily is divided into entomophily, ornithophily, chiropterophily and malacophily. Entomophily is the form of pollination in which pollination occurs by insects. In this, flowers are scented and contains nectar to attract insects. Ornithophily is the form of pollination in which pollination occurs by birds. In this, flowers are usually red in color and rich in nectar. Chiropterophily is the form of pollination in which pollination occurs by bats. In this, flowers are usually white or light colored and open at night. In malacophily, pollination occurs by slugs and snails.
Thus, the correct answer is option C.