Identify the incorrect pair.

1. Alkaloids - Codeine

2. Toxin - Abrin

3. Lectins - Concanavalin A

4. Drugs - Ricin

Doubtly Asked 30 Oct 2026 NEET UG 2021 Practice test neet Save WhatsApp Report

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Answer: 4. Drugs - Ricin

Codeine is an alkaloid - correct.
Abrin is a toxin - correct.
Concanavalin A is a lectin - correct.
Ricin is a toxin (from castor), not a drug - so the pair "Drugs - Ricin" is incorrect.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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