Correct Answer: B

Rationale: The appropriate diagnosis for the symptoms described in Kanjaga, a 7-year-old child, is hypothyroidism. Hypothyroidism can lead to symptoms such as fatigue, slow heart rate, dry skin, slower growth, and delayed puberty in children.

Correct Answer: A

Rationale: Diarrhea can be caused by various infectious agents such as bacteria, parasites, and viruses. Allergy, on the other hand, is a non-infectious cause of diarrhea. When an individual with a food allergy consumes the specific food they are allergic to, it can trigger diarrhea as a part of the allergic reaction.

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: 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: B

Rationale: Growth hormone deficiency refers to a condition where there is inadequate production of growth hormone by the pituitary gland. This results in impaired growth in children. While 80% of cases are of unknown cause (idiopathic), some may have familial patterns. It is more common in males than females. Cretinism is a condition of severe hypothyroidism during infancy, not related to growth hormone. Hypothyroidism is a disorder involving low thyroid hormone levels, and precocious puberty is the early onset of puberty. Therefore, the correct answer is 'Growth hormone deficiency.'