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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The most unique mammalian characteristic is the presence of milk producing glands (mammary glands) by which the young ones are nourished. Reason (R): All mammals, without any exception, are viviparous and give birth to young ones. In the light of the above statements, choose the most appropriate an

Options

  1. ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
  2. BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
  3. C(A) is incorrect but (R) is correct
  4. D(A) is correct but (R) is incorrect

Correct answer

D. (A) is correct but (R) is incorrect

Step-by-step solution

Assertion (A) is a correct statement. According to NCERT, the most unique characteristic of class Mammalia is the presence of milk producing glands (mammary glands) by which the young ones are nourished. Reason (R) is an incorrect statement. While most mammals are viviparous (give birth to young ones), there are exceptions. For example, Ornithorhynchus (Platypus) is an oviparous (egg-laying) mammal. Therefore, Assertion (A) is correct but Reason (R) is incorrect. Answer: (A) is correct but (R) is incorrect

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