Waldeyer's ring does not include:

Correct Answer: B

Rationale: The correct answer is B: submandibular glands. Waldeyer's ring consists of a ring of lymphoid tissue in the pharynx, including the palatine tonsils (faucal tonsils), adenoids, and lingual tonsils. Submandibular glands are salivary glands located beneath the mandible and are not part of Waldeyer's ring. Therefore, B is the correct answer. Choices A, C, and D are incorrect because they are all components of Waldeyer's ring.

Correct Answer: C

Rationale: The correct answer is C: clubbing. Plummer Vinson syndrome is characterized by the triad of iron deficiency anemia, dysphagia, and esophageal webs. Clubbing is not a typical feature of Plummer Vinson syndrome. Angular stomatitis (A), splenomegaly (B), and post cricoid web (D) are commonly associated with Plummer Vinson syndrome due to chronic iron deficiency anemia. Clubbing is more commonly seen in conditions such as chronic respiratory or cardiac diseases, not in Plummer Vinson syndrome.

Correct Answer: B

Rationale: Cooley's anemia is another term for thalassemia major, a genetic disorder characterized by abnormal hemoglobin production leading to severe anemia. The correct answer is B because Cooley's anemia specifically refers to thalassemia major. Sickle cell anemia (A) is a different genetic disorder caused by abnormal hemoglobin shape. High ESR (C) is a nonspecific marker of inflammation and does not directly relate to Cooley's anemia. Aplastic anemia (D) is a condition where the bone marrow does not produce enough blood cells, not related to Cooley's anemia.

Correct Answer: C

Rationale: Step-by-step rationale: 1. Chronic Myeloid Leukemia (CML) primarily involves the bone marrow and blood, not the liver, spleen, or lymph nodes. 2. Hepato-splenomegaly with lymphadenopathy are commonly seen in Acute Lymphoblastic Leukemia (ALL) and lymphoma. 3. Disseminated TB can cause hepato-splenomegaly but typically does not present with lymphadenopathy. Therefore, C (CML) is the correct answer as it does not typically present with the described findings.

Correct Answer: B

Rationale: The correct answer is B: 3-4 days. The half-life of a substance is the time it takes for half of the original amount to decay. In this case, since the half-life of platinum is 3-4 days, it means that after 3-4 days, half of the initial amount of platinum will have decayed. This answer is correct because it accurately represents the time frame for platinum decay. The other choices are incorrect because they do not correspond to the known half-life of platinum. Choice A (1-2 days), C (5-6 days), and D (7-8 days) are outside the typical half-life range for platinum, making them incorrect options.