JEE Main 2022 Chemistry question

The 'f' orbitals are half and completely filled, respectively in lanthanide ions [Given: Atomic no. Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70; Dy, 66]

Answer: (3)

Solution

is (half-filled) and is (completely filled). The other pairs have with $

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Question ID VK-034484