Select the option that is true regarding the following two statements labelled Assertion and Reason. Assertion (A): The major proteins in milk are casein and whey proteins. Reason (R): Casein constitutes approximately 20% of the total protein in bovine milk and whey proteins account for approximately 80%.

Correct option is C

The major proteins present in milk are casein and whey proteins, making the assertion factually correct.
Casein proteins are phosphoproteins found in milk as micellar structures, and they form the majority of total milk proteins.
Whey proteins are the remaining soluble proteins that stay in solution after casein is coagulated during cheese production.
In cow (bovine) milk, casein accounts for about 80% of the total protein content.
Whey proteins make up the remaining 20% of the protein content.
The reason statement claims that casein is 20% and whey proteins are 80%, which is the reverse of the actual values.
Thus, the reason provided is factually incorrect even though the assertion is accurate.
Because only the assertion is correct and the reason is wrong, the correct answer is Option (c).