All of the following drugs used for iron deficiency anemia EXCEPT:

Correct Answer: B

Rationale: The correct answer is B: Folic acid. Folic acid is not a drug used for iron deficiency anemia; it is a B-vitamin essential for normal cellular function but not directly related to iron supplementation. Ferrous sulfate, ferrous gluconate, and ferrous fumarate are all iron salts commonly used to treat iron deficiency anemia by replenishing the body's iron stores. Folic acid, on the other hand, is primarily used to prevent neural tube defects in pregnancy and to treat certain types of anemia not related to iron deficiency.

Correct Answer: C

Rationale: Step 1: Beta-adrenoceptor-blocking drugs primarily work by blocking the beta-adrenergic receptors in the body. Step 2: By blocking these receptors, these drugs decrease heart rate, blood pressure, and contractility of the heart muscle. Step 3: These hemodynamic effects lead to decreased myocardial oxygen requirements at rest and during exercise, providing beneficial effects. Step 4: Choice C is correct as it accurately describes the main mechanism and beneficial effects of beta-adrenoceptor-blocking drugs. Step 5: Choices A, B, and D are incorrect as they do not accurately describe the primary mechanism or effects of beta-adrenoceptor-blocking drugs.

Correct Answer: D

Rationale: The correct answer is D because all the listed drug groups influence cerebral blood flow. Ca-channel blockers dilate blood vessels, enhancing cerebral perfusion. GABA derivatives can modulate blood flow by affecting neurotransmission. Vinca minor derivatives like vincamine can improve cerebral circulation. Therefore, all choices have a direct impact on cerebral flow, making D the correct answer.

Correct Answer: A

Rationale: The correct answer is A: Radioiodines in the body emit mainly β radiations. This is because radioiodines typically decay by β- decay, releasing β particles. β radiation consists of electrons or positrons, which are emitted during the decay process. This type of radiation is commonly observed with radioiodines. Option B is incorrect because γ radiation is a type of electromagnetic radiation emitted by the nucleus, not by radioiodines in this case. Option C is incorrect because radioiodines predominantly emit β radiation, not an equal amount of β and γ. Option D is incorrect because radioiodines do emit radiation, particularly β radiation, and therefore are not completely safe in terms of radiation exposure.

Correct Answer: B

Rationale: The correct answer is B: Infiltration of leucocytes and phagocytic cells (phase of exudation). During the delayed, subacute phase of inflammation, infiltrating leukocytes, such as neutrophils and macrophages, play a crucial role in removing debris and pathogens. This phase is characterized by the migration of these cells to the site of injury, where they engulf and digest foreign substances. This process helps to clear the area of infection and promote tissue repair. Other choices are incorrect: A: Local vasodilatation and increased capillary permeability (phase of damage) - This describes the initial phase of inflammation, not the delayed subacute phase. C: Tissue degeneration and fibrosis occurrence (phase of proliferation) - This describes the later stages of inflammation involving tissue repair and remodeling, not the delayed subacute phase. D: All of the above - This is incorrect as choices A and C do not accurately describe the delayed, subacute