Question

Assertion: Bats and whales are classified as mammals.
Reason: Bats and whales have four chambered heart.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Both Assertion and Reason are false

Answer 1

The correct option is B Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Bats and whales are members of Class Mammalia. Bats are mammals which have wings and can fly, while whales are the largest animals in existence. Both bats and whales have four chambered hearts, but this is not the reason for them to be classified as mammals. They are mammals because of the presence of mammary glands. Moreover, birds and crocodiles also have four chambered hearts, which indicates that the four chambered heart is not unique to mammals alone.