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: B
Solution :
Metamorphosis is a process where, an organism changes its larval characteristics and attains adult form. After swimming for some time, the tornaria larva (through indirect development) sinks down the bottom. Its transparency is lost and the ciliated bands are distinguished into the proboscis, collar and trunk and simultaneously the notochord, gill-slits and coelomic sacs are also formed. Thus the, larva gradually changes into adult.
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