Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Specific gravity of whole milk increases when held at lower/cold temperature. This phenomenon is known as Recknagel phenomenon.
Reason (R) : Reckangel phenomenon occurs mainly due to loss of entrapped gas when milk is held at lower temperature.
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 but (R) is NOT the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is not correct but (R) is correct.

Hint:

To eliminate the error caused by the Recknagel phenomenon when measuring specific gravity using a lactometer:
Warm the milk sample to $40^\circ$ C to melt the crystallized fat, then cool it back down to the lactometer calibration temperature ($15.5^\circ$ C, $20^\circ$ C, or $27^\circ$ C) and read the value immediately.

Answer 1

The Correct Option is C