Hodgkin lymphoma B symptoms include:

Correct Answer: D

Rationale: The correct answer is D because Hodgkin lymphoma B symptoms include all of the above. A - Loss of weight can be a symptom due to metabolic changes. B - Drenching night sweats are common in Hodgkin lymphoma. C - Fever without infection is a classic B symptom. Therefore, all three symptoms are characteristic of Hodgkin lymphoma B symptoms.

Correct Answer: C

Rationale: The correct answer is C: Quinine and clindamycin. Quinine is recommended for treating malaria in pregnant women due to its safety profile during pregnancy. Clindamycin is often used in combination with quinine to enhance efficacy and reduce the risk of parasite resistance. - A (Atovaquone and proguanil) is contraindicated in pregnancy due to limited safety data. - B (Quinine and doxycycline) is not recommended in pregnant women as doxycycline can cause adverse effects on fetal development. - D (Mefloquine) is generally not recommended in pregnancy due to potential risks to the fetus.

Correct Answer: D

Rationale: The correct answer is D: Aplastic anemia. In a 50-year-old with infections, petechiae, and a dry marrow tap, the presentation is indicative of bone marrow failure, characteristic of aplastic anemia. This condition results in pancytopenia, leading to infections, bleeding (petechiae), and a dry tap on bone marrow aspiration. Iron deficiency anemia (A) typically presents with microcytic hypochromic red blood cells, megaloblastic anemia (B) with macrocytic red blood cells, and hemolytic anemia (C) with evidence of red blood cell destruction.

Correct Answer: C

Rationale: Step 1: Neutrophils, bands, metamyelocytes, myelocytes increased indicates a myeloproliferative disorder. Step 2: Basophils, eosinophils increased suggest a myeloid origin. Step 3: Platelets increased is common in chronic myelocytic leukemia (CML) due to myeloid proliferation. Summary: A is incorrect as it is associated with abnormal lymphoid cells. B is incorrect as it is a lymphoid disorder. D is incorrect as it is a lymphoid leukemia.

Correct Answer: C

Rationale: The correct answer is C because a hapten is a small chemical grouping that can bind to preformed antibodies but cannot induce an immune response on its own. Haptens require a carrier molecule to become immunogenic. Choice A (An epitope) is incorrect because an epitope is the specific part of an antigen recognized by an antibody. Choice B (A paratope) is incorrect as a paratope is the part of an antibody that binds to an antigen. Choice D (A carrier) is incorrect because a carrier is a molecule that can bind to a hapten to make it immunogenic.