Which statement about powdered formulas is correct regarding reconstitution and storage?

• A. They can be stored at room temperature for up to 24 hours after reconstitution.
• B. Powdered formulas reconstituted in advance should be refrigerated immediately after preparation and discarded within 24 hours if not used, and exposed to room temperature for no longer than 4 hours.
• C. They should be refrigerated for 3 days before use.
• D. They should be used within 2 hours even if refrigerated.

Answer: (B)