Hydrocolloid carrageen is obtained from: [NEET-2022]

(A)Chlorophyceae and Phaeophyceae
(B)Phaeophyceae and Rhodophyceae
(C)Rhodophyceae only
(D)Phaeophyceae only

The NCERT line that answers it

Verbatim line

Certain marine brown and red algae produce large amounts of hydrocolloids (water holding substances), e.g., **algin** (brown algae) and **carrageen** (red algae) which are used commercially.

Chapter: Plant Kingdom
Section: 3.1 ALGAE
Page: 3
Words matched: 26 of 26

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'carrageen (red algae)', which directly and conclusively identifies carrageen as coming from red algae (Rhodophyceae) only, matching option C and distinguishing it from all other options.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

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Question text is reproduced from the published NEET 2022 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.