The sugar present in RNA molecule is
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → β-D-ribose
The sugar in RNA is β-D-ribose, and both labels in the name matter. D gives the configuration of the sugar (the –OH on the lowest chiral carbon is on the right in the Fischer projection, as in D-glyceraldehyde). β gives the configuration at the anomeric carbon C-1 of the ring form, where the base is attached.
NCERT (2026-27 edition):
Chemical Composition of Nucleic Acids
Note: The same/similar question has been asked in different years by NTA as per the details given below:
| 2026 | 2025 | 2024 | 2023 | 2022 |
|---|---|---|---|---|
| 19-05 S1 | – | – | 02-07 S3 | – |