A) Dermis
B) Mucous gland
C) Sweat glands
D) Stratum germinativum
Correct Answer: B
Solution :
Mucous glands are present in the skin of frog which secrete mucus that makes the frogs skin slippery and moist and help in cutaneous respiration ie, gaseous exchange occurs through skin. In mammals, mucous glands are absent as skin is not respiratory.
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