Question:
Assertion (A): Female Wuchereria is ovoviviparous.
Reason (R): Larva of Wuchereria exhibits nocturnal periodicity.
Assertion (A): Female Wuchereria is ovoviviparous.
Reason (R): Larva of Wuchereria exhibits nocturnal periodicity.
Reason (R): Larva of Wuchereria exhibits nocturnal periodicity.
Show Hint
Microfilariae of Wuchereria show nocturnal periodicity to match mosquito feeding time.
Updated On: Jun 19, 2026
- A is correct but R is wrong
- A is wrong but R is correct
- Both A and R are correct and R is the correct explanation of A
- Both A and R are correct but R is not the correct explanation of A
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The Correct Option is D
Solution and Explanation
Step 1: Understand Wuchereria.
Wuchereria bancrofti is a parasitic nematode responsible for lymphatic filariasis.
Step 2: Evaluate Assertion (A).
Female Wuchereria is ovoviviparous, meaning it gives birth to larvae (microfilariae) rather than eggs. So A is correct.
Step 3: Evaluate Reason (R).
Larvae of Wuchereria show nocturnal periodicity, i.e., they appear in peripheral blood at night. So R is correct.
Step 4: Check relationship.
Nocturnal periodicity is related to transmission by mosquitoes, not ovoviviparity.
Step 5: Compare statements.
Both A and R are correct individually but are not causally related.
Step 6: Conclusion.
Thus, both A and R are correct but R is not the correct explanation of A.
Wuchereria bancrofti is a parasitic nematode responsible for lymphatic filariasis.
Step 2: Evaluate Assertion (A).
Female Wuchereria is ovoviviparous, meaning it gives birth to larvae (microfilariae) rather than eggs. So A is correct.
Step 3: Evaluate Reason (R).
Larvae of Wuchereria show nocturnal periodicity, i.e., they appear in peripheral blood at night. So R is correct.
Step 4: Check relationship.
Nocturnal periodicity is related to transmission by mosquitoes, not ovoviviparity.
Step 5: Compare statements.
Both A and R are correct individually but are not causally related.
Step 6: Conclusion.
Thus, both A and R are correct but R is not the correct explanation of A.
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