Question

Mostly healthy open cows will start a new reproductive cycle every ______ days.

(a) 5-7

(b) 21-28

(c) 30-34

(d) 47-50

I had been asked this question in an online interview.

This interesting question is from Cow Milk topic in section Primary Production of Milk of Dairy Engineering

Answer 1

Right answer is (b) 21-28

To explain I would say: Reproductive cycle for healthy cows start every 21-28 days.