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Which of the following statement(s) is/are correct for class amphibia?
(i) Body is divisible into head and trunk.
(ii) Respiration is through gills only.
(iii) The heart is two chambered i.e. one auricle and one ventricle.
(iv) Fertilization is internal.

A. Only (i)

B. Only (iv)

C. (i), (ii) and (iii)

D. All of these

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