Assertion : Silver is a transition element.
Reason : Silver atom has completely filled d-orbitals $(4 d^{10})$ in its ground state.

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Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

(A) is true but (R) is false

answer is B.

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Detailed Solution

The silver atom's $4 d^{10}$ shape in the ground state indicates that its d- orbitals are all filled. However, it has a structure of $4 d^{9}$ in its most stable oxidation state (+1), which has a partially filled d-orbital. Thus, it is transition element.

Assertion is correct, reason is correct, but reason is NOT correct explanation assertion.

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