Which of the following is $NOT$ a breed of buffalo?

What is the average fat content of buffalo milk (in $\%$)?

When breeding is between animals of the same breed for $4-6$ generations,it is called:

Meat,milk,and eggs mainly provide us with ...... .

The practices concerned with the improvement in animal husbandry include:

Assertion $A$: Milk is a useful product used as a valuable food.
Reason $R$: It is the fresh natural secretion of the mammary glands of female mammals for the nourishment of their young ones.
Which option is correct for Assertion $A$ and Reason $R$?