Assertion:Mitochondria are believed to originate by growth and division of previously existing ones .
Reason:They contain DNA and Ribosomes

Options

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 a correct explanation of Assertion
C. Assertion is true but Reason is false
D. Assertion is false but Reason is true

Answer

B