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Verified Answer & Explanation⌄

Correct Answer: A) n = 4, ℓ = 3, mℓ = +1, mₛ = +½

Concept Explanation

For a 4f electron: n = 4 ℓ = 3 mℓ = −3 to +3 mₛ = ±½ Only option A satisfies all conditions.