Angular stomatitis/cheilosis is a symptom of vitamin B12 deficiency?

Correct Answer: B

Rationale: The correct answer is B: FALSE. Angular stomatitis/cheilosis is not a symptom specific to vitamin B12 deficiency. This condition is more commonly associated with deficiencies in iron, riboflavin, and niacin. Vitamin B12 deficiency typically presents with symptoms such as fatigue, weakness, pale skin, and neurological issues. Therefore, options A and C are incorrect as angular stomatitis/cheilosis is not sometimes or always a symptom of vitamin B12 deficiency. Option D is also incorrect as this condition can occur in individuals of all ages, not just children.

Correct Answer: C

Rationale: Rationale: Absolute lymphocytosis with hepatomegaly or splenomegaly indicates an intermediate risk in Rai Staging System, which corresponds to Stage II. Hepatomegaly or splenomegaly alone would be Stage I, while lymphadenopathy alone would be Stage 0. Stage III in CLL prognosis involves anemia and/or thrombocytopenia along with lymphocytosis. Therefore, the correct answer is Stage II. Other choices are incorrect because they do not accurately reflect the specific combination of symptoms described in the question.

Correct Answer: D

Rationale: The correct answer is D: Eosinophils. Eosinophils are involved in allergic reactions due to their role in fighting parasitic infections and regulating inflammatory responses. During an allergic reaction, eosinophils increase in number to help combat the allergen. Lymphocytes (A) are involved in immune responses but are not specifically associated with allergic reactions. Neutrophils (B) are the most abundant type of white blood cells and are typically involved in bacterial infections, not allergic reactions. Monocytes (C) are involved in the immune response against pathogens but are not specifically related to allergic reactions. Eosinophils are the key players in allergic responses due to their specialized functions in combating allergens and modulating inflammation.

Correct Answer: B

Rationale: The correct answer is B: Lymphocyte. Lymphocytes can develop in sites other than the bone marrow, such as the thymus and lymph nodes. Monocytes, Megakaryocytes, and Neutrophils develop exclusively in the bone marrow. Monocytes differentiate into macrophages and dendritic cells, while Megakaryocytes produce platelets. Neutrophils are a type of white blood cell involved in the immune response. Therefore, only lymphocytes have the ability to develop outside the bone marrow, making choice B the correct answer.

Correct Answer: B

Rationale: The correct answer is B: Proper handwashing. This is the most important practice in preventing the spread of disease because it effectively removes germs and bacteria from hands, reducing the risk of transmission. Handwashing is crucial in healthcare settings to prevent infections. A: Wearing masks during patient contact is important, but handwashing is more effective in preventing disease spread as it directly addresses the transmission of germs through hands. C: Wearing disposable lab coats is important for infection control but not as crucial as proper handwashing, which directly removes germs from hands. D: Identifying specimens with red labels is important for handling potentially infectious materials, but handwashing is still the most essential practice in preventing disease spread as it addresses the primary mode of transmission through hands.