Identify the molecule with linear geometry?

1. $\mathrm{ClF}_{3}$
2. $\mathrm{X}_{2} \cdot \mathrm{C}_{2} \mathrm{H}_{4}$
3. $\mathrm{BeF}_{2}$
4. $\mathrm{X}_{4} \mathrm{SO}_{2}$

Asked in: MHT CET 2020 (20 Oct Shift 1)

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