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Two statements are given$-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below:
Assertion $(A)$ : Linkage isomerism arises in coordination compounds because of ambidentate ligand.
Reason $(R)$ : Ambidentate ligand like $NO_2$ has two different donor atoms i.e., $N$ and $O$.

• ✓
  Both Assertion $(A)$ and Reason $(R)$ are correct statements, and Reason $(R)$ is the correct explanation of the Assertion $(A)$.
• B
  Both Assertion $(A)$ and Reason $(R)$ are correct statements, but Reason $(R)$ is not the correct explanation of the Assertion $(A).$
• C
  Assertion $(A)$ is correct, but Reason $(R)$ is incorrect statement.
• D
  Assertion $(A)$ is incorrect, but Reason $(R)$ is correct statement.