Correct Answer: C

Rationale: Encouraging the child to drink liquids is essential in managing ketones in urine. Increased fluid intake can help prevent dehydration and aid in flushing out ketones, which is crucial in managing diabetic ketoacidosis, a serious complication of uncontrolled diabetes.

Correct Answer: D

Rationale: Coryza, also known as the common cold, primarily affects the upper respiratory tract and is not typically associated with lower respiratory tract infections. Pneumonia, asthma, and bronchiolitis are conditions that can manifest as lower respiratory tract infections.

Correct Answer: A

Rationale: For a 7-month-old baby with diarrhea and signs of moderate dehydration who can still drink, the most appropriate fluid is Oral Rehydration Solution (ORS). ORS helps in rehydrating the body and replenishing lost electrolytes, making it essential in managing dehydration due to diarrhea.

Correct Answer: D

Rationale: All the listed conditions, central cyanosis, respiratory rate >70 breaths per minute, and grunting on assessment, are indicative of the need for oxygen therapy. Central cyanosis suggests severe hypoxemia, a respiratory rate >70 breaths per minute can indicate respiratory distress, and grunting is a sign of increased work of breathing. Administering oxygen in these situations can help improve oxygenation and support the child's respiratory function, making option D the correct choice.

Correct Answer: A

Rationale: Hormones play a crucial role in various bodily functions such as regulating metabolism, growth, and maintaining homeostasis. However, producing new offspring involves reproductive processes controlled by other systems in the body, not directly by hormones.