Question

Rhabditoid$/$rhabditiform larva occurs in life cycle of

• A. Liver fluke
• B. Ascaris
• C. Tapeworm
• D. Planaria

Answer 1

The correct option is B Ascaris

Ascaris is monogenetic since it has only one host, a man in which infection occurs directly. Cleavage is spiral, determinate and holoblastic. The first larva is formed 10-14 days after cleavage and is called rhabditiform larva or first larva which is not an infective stage. In another week, it molts to become the second larva, which is capable of infecting the host.

So, the correct answer is 'Ascaris'.