What is molecular formula of allyl chloride?

What is molecular formula of allyl chloride?
  1. $\mathrm{C}_{3} \mathrm{H}_{3} \mathrm{Cl}$
  2. $\mathrm{C}_{3} \mathrm{H}_{5} \mathrm{Cl}$
  3. $\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{Cl}$
  4. $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{Cl}$

Asked in: MHT CET 2020 (14 Oct Shift 2)

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