A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: A
Solution :
Liver fluke has to change its morphologic, as well as physiological characteristics to adapt itself within the host body. The adaptations are - (i) Enzyme resistant outer thick tegument. (ii) Locomotory organs are absent. (iii) Oral sucker, acetabulum and spines of body wall serve for the attachment with the host's body. (iv) Alimentary canal ill developed. (v) Adults lack circulatory, respiratory and sensory organ. (vi) Reproductive system lightly developed.
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