What is the number of $-\mathrm{OH}$ groups present in one molecule of ribose?

What is the number of $-\mathrm{OH}$ groups present in one molecule of ribose?
  1. $2$
  2. $3$
  3. $4$
  4. $5$

Asked in: MHT CET 2023 (12 May Shift 2)

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