Chemistry · PYQ NEET UG 2020

Identify a molecule which does NOT exist.

1. A
   \( \mathrm{Li}_2 \)
2. B
   \( \mathrm{C}_2 \)
3. C
   \( \mathrm{O}_2 \)
4. D
   \( \mathrm{He}_2 \)