Question

Match List-I with List-II

List-I (Unconventional feed ingredient)	List-II (Anti-nutritional/deleterious factor)
(A) Mahua seed cake	(I) Tannins
(B) Karanj seed cake	(II) Mowrin
(C) Tamarind seed hulls	(III) Ricin
(D) Castor beans	(IV) Karanjin

Choose the correct answer from the options given below

• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (III)
• (A) - (II), (B) - (I), (C) - (III), (D) - (IV)

Hint:

To solve this matching problem quickly, use high-confidence pairs:
- Castor is famous for containing the highly toxic glycoprotein Ricin (D-III).
- Karanj is chemically related to the active principle Karanjin (B-IV).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Unconventional feed ingredients are alternative feed resources used in livestock diets to reduce feeding costs. However, their use is often limited by the presence of natural anti-nutritional or toxic factors, which must be identified and neutralized.

Step 2: Detailed Explanation:
Let us analyze and pair each unconventional feed with its characteristic toxic or anti-nutritional compound:

(A). Mahua seed cake: Mahua (Madhuca longifolia) seed cake contains a highly toxic, bitter saponin calledmowrin. It is hemolytic and highly unpalatable, requiring thermal processing or chemical extraction before feeding. Thus, (A) matches with (II).

(B). Karanj seed cake: Karanj (Pongamia pinnata) seed cake contains a furanoflavonoid compound calledkaranjin. It is highly toxic, causing gastrointestinal irritation and reduced feed intake. Thus, (B) matches with (IV).

(C). Tamarind seed hulls: Tamarind (Tamarindus indica) seed hulls are exceptionally rich in polyphenolic compounds calledtannins, which bind to proteins and digestive enzymes, reducing protein digestibility. Thus, (C) matches with (I).

(D). Castor beans: Castor (Ricinus communis) seeds containricin, a highly toxic ribosome-inactivating glycoprotein. Even trace amounts of raw ricin can cause severe hemorrhagic enteritis and death. Thus, (D) matches with (III).
Combining these matches, we obtain the sequence: (A) - (II), (B) - (IV), (C) - (I), (D) - (III).

Step 3: Final Answer:
The correct option is (B).