Question:
Assertion (A): Life history of flukes is complex.
Reason (R): Life history of flukes includes many hosts and larval stages.
Assertion (A): Life history of flukes is complex.
Reason (R): Life history of flukes includes many hosts and larval stages.
Reason (R): Life history of flukes includes many hosts and larval stages.
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Flukes require multiple hosts like snail and vertebrate for completing life cycle.
Updated On: Jun 19, 2026
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not the correct explanation of A
- A is true but R is false
- A is false but R is true
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The Correct Option is A
Solution and Explanation
Step 1: Understand flukes (Trematodes).
Flukes are parasitic flatworms belonging to class Trematoda with complex life cycles.
Step 2: Analyze Assertion (A).
Flukes show a complex life cycle involving multiple developmental stages, so A is correct.
Step 3: Analyze Reason (R).
Flukes require multiple hosts (intermediate and definitive) and undergo several larval stages. Hence R is correct.
Step 4: Relationship between A and R.
The complexity of fluke life cycle is directly due to multiple hosts and larval stages.
Step 5: Evaluate explanation.
Since R explains why A is true, it is the correct explanation.
Step 6: Conclusion.
Both A and R are true and R correctly explains A.
Flukes are parasitic flatworms belonging to class Trematoda with complex life cycles.
Step 2: Analyze Assertion (A).
Flukes show a complex life cycle involving multiple developmental stages, so A is correct.
Step 3: Analyze Reason (R).
Flukes require multiple hosts (intermediate and definitive) and undergo several larval stages. Hence R is correct.
Step 4: Relationship between A and R.
The complexity of fluke life cycle is directly due to multiple hosts and larval stages.
Step 5: Evaluate explanation.
Since R explains why A is true, it is the correct explanation.
Step 6: Conclusion.
Both A and R are true and R correctly explains A.
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