Assertion : The binding energy per nucleon, for nuclei with atomic mass number `A gt 100`, decreases with A
Reason :The nuclear forces are weak for heavier nuclei.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion
B. If both assertion and reason are true but reason is not the correct explanantion of the assertion
C. If assertion is true but reason is false
D. If the assertion and reason both are false