The primary reason for a physician to prescribe human insulin is that:

Correct Answer: C

Rationale: The correct answer is C because human insulin can be given to patients who have an allergy to animal insulins. This is crucial as some patients may develop allergic reactions to animal insulins, making it unsafe for them to use. Human insulin, being a synthetic form, is less likely to trigger allergies in such patients. The other choices, A, B, and D, are incorrect as they do not address the primary reason for prescribing human insulin, which is the specific need for patients with allergies to animal insulins.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Diazoline contains cetirizine, a second-generation antihistamine with a long duration of action. 2. Cetirizine has a half-life of approximately 7-10 hours, providing prolonged relief. 3. Its long-acting nature makes it effective in managing allergies for up to 24-48 hours. 4. Diprazine, Suprastine, and Dimedrol do not contain cetirizine and are not known for their long duration of action. Summary: Diazoline (choice A) is the correct answer as it contains cetirizine, a long-acting antihistamine. Choices B, C, and D do not contain cetirizine and are not known for their extended duration of action.

Correct Answer: B

Rationale: The correct answer is B because keratomalacia is specifically defined as softening and subsequent ulceration and perforation of the cornea due to severe vitamin A deficiency. Choice A is incorrect as it describes xerophthalmia, not keratomalacia. Choice C describes photophobia, not keratomalacia. Choice D is incorrect as it includes all the options, but only choice B accurately defines keratomalacia.

Correct Answer: A

Rationale: Rationale: 1. Type I familial hyperlipoproteinemia is characterized by increased chylomicrons and triglycerides in the serum, which decrease with a fat-free diet. 2. High- and low-density lipoproteins decrease with a fat-free diet, contrary to other types of hyperlipoproteinemia. 3. Tissue lipoprotein lipase activity is decreased in type I familial hyperlipoproteinemia. 4. Other choices are incorrect because they do not accurately describe the characteristics and pathophysiology of type I familial hyperlipoproteinemia. Summary: Choice A is correct as it aligns with the hallmark features of type I familial hyperlipoproteinemia. Choices B, C, and D contain inaccuracies regarding the lipid profile, genetic basis, and response to dietary changes in this condition.

Correct Answer: D

Rationale: The correct answer is D because the parathyroid hormone (PTH) has multiple functions in the body. A: PTH increases calcium and phosphate absorption in the intestine by stimulating the production of active vitamin D. B: PTH decreases calcium excretion and increases phosphate excretion in the kidneys, helping to maintain serum calcium levels. C: In bone, PTH increases calcium and phosphate resorption at high doses and may increase bone formation at low doses. Therefore, all of the above statements are true, making D the correct choice.