In cows, normally placenta is expelled -

Correct option is A

· Correct answer: (a) Within 4 to 8 hrs of parturition
· In cows, the placenta is typically expelled within 4 to 8 hours of parturition. If it is not expelled in this time frame, it can lead to complications.
Other options:
· (b) Within 20 to 24 hrs of parturition: This is too long for normal placenta expulsion.
· (c) Within 30 to 34 hrs of parturition: Too long, which could indicate a problem like retained placenta.