Given below are two statements. One is labelled as Assertion (A)...

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The binding energy per nucleon is found to be practically independent of the atomic number A, for nuclei with mass numbers between 30 and 170. Reason (R): Nuclear force is long range. In the light of the above statements, choose the correct answer from the options given below :

Options

A $(A)$ is true but (R) is false
B(A) is false but (R) is true
CBoth $(\mathbf{A})$ and $(\mathbf{R})$ are true and $(\mathbf{R})$ is the correct explanation of $(\mathbf{A})$
DBoth (A) and (R) are true but (R) is NOT the correct explanation of (A)

Correct answer

A. $(A)$ is true but (R) is false

Step-by-step solution

From graph between B.E/N & A we can see BE/N is almost constant

\Rightarrow

correct Reason

\Rightarrow

incorrect as nuclear forces are short range forces.

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