Correct option is A
The baby's symptoms—restlessness, irritability, sunken eyes, and skin pinch going back slowly—are classic signs of "some dehydration" as per IMCI (Integrated Management of Childhood Illness) guidelines. The recommended management is oral rehydration therapy (ORS) with continued feeding. IV fluids are reserved for severe dehydration, and referral is not needed unless there's danger sign or treatment failure.
Explanation for each option: (a) diagnose the baby having some dehydration and start ORS: Correct. These clinical features match WHO's definition of some dehydration, and ORS is the first line of treatment. (b) refer the patient to higher centre: Incorrect. Referral is only necessary in cases of severe dehydration or complications such as shock or unconsciousness. (c) baby has no dehydration, no treatment required: Incorrect. The baby's signs clearly indicate dehydration; skipping treatment would risk worsening. (d) baby has some dehydration, start intravenous fluids: Incorrect. IV fluids are used for severe dehydration or if the child cannot drink. (e) question not attempted: Not applicable.