Assertion :Dark reactions are called bio synthetic phase of photosynthesis . Reason: Dark reactions do not directly depend on the presence of light but are dependent on the products of the light reactions ,i.e. ATP and NADPH.

a. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
b. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
d. Both Assertion and Reason are incorrect