Question

Assertion (A): During dahi preparation milk is heated to temperature of 70-72°C for 2-5 minutes.
Reason (R): Heating milk to higher temperature-time regime kills contaminating and competitive microorganisms, produces growth factors by breakdown of milk proteins and creates desirable body and texture in dahi.
In light of the above statements, choose the correct answer from the options given below:

• A. Both (A) and (R) are true and (R) is the correct explanation of (A)
• B. Both (A) and (R) are true and (R) is NOT the correct explanation of (A)
• C. (A) is true but (R) is false
• D. (A) is false but (R) is true

Hint:

Dahi: milk heated to 70-72°C/2-5min.
Purpose: kill contaminants, produce growth factors, improve body and texture.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Dahi preparation involves heating milk.
The heating has specific purposes.

Step 2: Key Formula or Approach:
No specific formula.
Need to understand the dahi preparation process.

Step 3: Detailed Explanation:
Assertion A: Milk is heated to 70-72°C for 2-5 minutes - true.
Reason R: Heating kills contaminants, produces growth factors, creates desirable body and texture - true.
The reason explains why heating is done.
Thus, both A and R are true, and R explains A.

Step 4: Final Answer:
Both (A) and (R) are true and (R) is the correct explanation of (A).
Hence, the correct option is (A).