Question

Match List-I with List-II

List-I (Feed Ingredients)		List-II (Used as a Source of)
A	Groundnut cake	I	Binder
B	Tapioca flour	II	Protein
C	Ethoxyquin	III	Carbohydrate
D	Rice bran	IV	Antioxidant

Choose the correct answer from the options given below:

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

Hint:

Always associate starch-rich ingredients like Tapioca flour with "Binder" and lipid preservatives like Ethoxyquin with "Antioxidant" to quickly solve feed-formulation match questions.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Aquaculture feed is formulated by blending various plant and animal-derived ingredients to meet the nutritional requirements of cultured species.
Each ingredient is selected for its specific biochemical composition and functional properties, such as protein content, energy (carbohydrate) source, binding ability, or preservation.

Step 2: Detailed Explanation:
Let us analyze each feed ingredient and its corresponding role:
- (A) Groundnut cake: It is a solid residue obtained after extracting oil from groundnuts. It contains about 40--45% crude protein and serves as a major plant protein source in fish feeds. Thus, (A) matches with (II).
- (B) Tapioca floor (flour): It contains high amounts of starch. When heated during feed processing, starch gelatinizes and acts as an excellent adhesive and binding agent to hold the pellet together and maintain water stability. Thus, (B) matches with (I).
- (C) Ethoxyquin: It is a synthetic chemical antioxidant added to fish feeds to prevent the auto-oxidation of highly unsaturated lipids, extending the shelf-life of the feed and preventing rancidity. Thus, (C) matches with (IV).
- (D) Rice bran: It is a by-product of rice milling, rich in starch and fiber, and serves primarily as an economical carbohydrate and energy source in conventional feeds. Thus, (D) matches with (III).
Combining these points gives the sequence: (A) - (II), (B) - (I), (C) - (IV), (D) - (III).

Step 4: Final Answer:
The correct matching sequence is (A) - (II), (B) - (I), (C) - (IV), (D) - (III), which corresponds to Option (D).