Assertion : Fibrins are formed by the conversion of inactive fibrinogens on the plasma by the enzyme thrombin
Reason : Plasma without fibrinogen and blood corpuscles is called serum.
A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false