Step 1: Understanding the Concept:
Ketosis is a metabolic disorder in dairy cows.
Some vitamins help in its management.
Step 2: Key Formula or Approach:
No specific formula.
Need to know vitamins used for ketosis.
Step 3: Detailed Explanation:
Niacin (vitamin B3) has a beneficial role in managing ketosis.
It reduces ketone body production.
Betaine is a methyl donor.
Pyridoxine (B6) is involved in amino acid metabolism.
Pantothenic acid (B5) is part of CoA.
Thus, niacin is used for ketosis management.
Step 4: Final Answer:
Niacin has a beneficial role in managing ketosis.
Hence, the correct option is (C).