Question

Match the following:

• A. A - II, B - I, C - V, D - III
• B. A - IV, B - I, C - II, D - III
• C. A - III, B - IV, C - I, D - V
• D. A - III, B - V, C - I, D - II

Hint:

{Wuchereria} is {Ovoviviparous}, releasing Microfilariae. {Ascaris} is {Oviparous}, releasing eggs with a Rhabditiform larva developing inside.

Answer 1

The Correct Option is D

Step 1: Match Specific Characteristics:

• C. Mouth with three chitinous lips: This is the most diagnostic feature of Ascaris lumbricoides (Roundworm), which has a triradiate mouth guarded by one dorsal and two ventrolateral lips. Therefore, C $\rightarrow$ I.
• D. Nocturnal periodicity: The larvae (Microfilariae) of Wuchereria bancrofti reside in deep blood vessels during the day and migrate to peripheral circulation at night ($10\,\text{PM} - 4\,\text{AM}$) to coincide with the feeding habit of the vector (Culex mosquito). Therefore, D $\rightarrow$ II.
• B. Ovoviviparous: Female Wuchereria does not lay eggs but releases juveniles (microfilariae) directly. This condition is called ovoviviparity. Therefore, B $\rightarrow$ V (Female Wuchereria).
• A. Curved posterior end: Sexual dimorphism in nematodes often involves the male having a curved tail with copulatory spicules. Thus, this description applies to Male Wuchereria. Therefore, A $\rightarrow$ III.

Step 2: Final Sequence:
A - III, B - V, C - I, D - II $\Rightarrow$ Option (D)