Energy of the Electron & Energy Levels question from JEE Main 2005 (AIEEE)

Answer: (b)

1. Emission means a downward transition; (i) is upward ($1\to3$), so it is absorption.
2. Downward transitions: (ii) $4\to3$, (iii) $2\to1$, (iv) $4\to2$.
3. In units of 13.6 eV: $4\to3$: $0.049$, $2\to1$: $0.75$, $4\to2$: $0.1875$.
4. So the answer is (b) (iii).