Correct Answer: B

Rationale: The correct answer is B: candidiasis. Candidiasis is a fungal infection caused by Candida albicans, commonly seen in immunocompromised individuals like cancer patients post-chemotherapy. The raw, red, and bleeding areas indicate mucosal irritation, while the white, cheesy coating represents fungal overgrowth. Carcinoma (choice A) refers to cancerous growths, which typically present differently. Leukoplakia (choice C) is a precancerous lesion characterized by white patches, not raw areas with bleeding. Koplik's spots (choice D) are small, white spots seen in the mouth in measles, not indicative of the described findings.

Correct Answer: D

Rationale: The correct answer is D, an ulceration with rolled edges on the side of the tongue, as it could indicate a possible malignancy such as oral cancer. The presence of rolled edges is concerning for malignancy due to the irregularity in shape and potential for rapid growth. This finding should be promptly investigated to rule out cancer. A: A painful vesicle inside the cheek for 2 days is likely a benign condition such as a canker sore. B: The presence of moist, nontender Stenson's ducts is a normal finding in the mouth. C: Stippled gingival margins that adhere snugly to the teeth could indicate a healthy gum tissue attachment. In summary, the other choices are less concerning as they are either benign or normal variations, while the presence of an ulceration with rolled edges raises significant suspicion for malignancy.

Correct Answer: A

Rationale: The correct answer is A: allergies. The symptoms described such as chronic watery eyes, sneezing, and clear nasal drainage are classic signs of allergies. The presence of a transverse line across the bridge of the nose, dark blue shadows under the eyes, and a double crease on the lower eyelids are typical physical exam findings in children with allergic rhinitis. These signs are known as Dennie-Morgan lines, allergic shiners, and allergic crease respectively. Allergies are the most likely cause based on the symptoms and physical exam findings. Sinus infection (choice B) typically presents with purulent nasal discharge and facial pain. Nasal congestion (choice C) usually involves nasal stuffiness and may not present with the specific eye findings mentioned. An upper respiratory infection (choice D) may present with fever, cough, and nasal discharge, but the eye findings described are not characteristic of an upper respiratory infection.

Correct Answer: B

Rationale: The correct answer is B: candidiasis. Candidiasis is a fungal infection caused by Candida albicans, commonly seen in immunocompromised individuals like cancer patients post-chemotherapy. The raw, red, and bleeding areas indicate mucosal irritation, while the white, cheesy coating represents fungal overgrowth. Carcinoma (choice A) refers to cancerous growths, which typically present differently. Leukoplakia (choice C) is a precancerous lesion characterized by white patches, not raw areas with bleeding. Koplik's spots (choice D) are small, white spots seen in the mouth in measles, not indicative of the described findings.

Correct Answer: D

Rationale: The Romberg test assesses the maintenance of standing balance by having the patient stand with feet together, arms at the sides, and eyes closed. If the patient sways or loses balance, it may indicate proprioceptive deficits. Conductive hearing loss (A) is related to sound transmission issues in the outer or middle ear, not balance. Lateralization of hearing (B) relates to distinguishing sound direction. Sensorineural loss (C) involves inner ear or auditory nerve damage, not balance. Therefore, the correct answer is D as the Romberg test specifically evaluates standing balance.