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Question

Assertion (A): Anopheles and Culex belong to Arthropoda.

Reason (R): They are eucoelomates and the body cavity is modified into haemocoel and is filled up with body fluid haemolymph.

A
Both A and R are true and R is the correct explanation of A
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B
Both A and R are true but R is not the correct explanation of A
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C
A is true but R is false
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D
A and R are false
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Solution

The correct option is B Both A and R are true but R is not the correct explanation of A
Both A and R are true but R is not the correct explanation of A.

Anopheles and Culex are insects. They are included in phylum Arthropoda because of the presence of jointed appendages, which is the defining characteristic of the phylum Arthropoda.

The statements given as reason is one of the general characteristic and not the defining characteristic of the members of the phylum Arthropoda and many other organisms belonging to phylum such as Mollusca are also eucoelomates and have open circulatory system.

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