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941 Unknown

A 37-year-old woman comes to you for recurrent episodes of double vision and drooping of her eyelids for the last month. Such episodes occur, last for hours, and resolve spontaneously. She also reports occasional hoarseness, which also come and go. Vital signs and physical examination are normal. Most appropriate next step in diagnosis is?

ABlood, urine, and CSF analysis
BMRI of the head
CEEG recording
DElectromyography under repetitive stimulation
Unknown
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944 Unknown

A 20-year-old female presented to the dermatology OPD with skin lesions which were itchy, violaceous, shiny flat topped, polygonal papules of various sizes on flexor surface of wrist. These when viewed under a magnifying lens, surface of the lens showed ceain streaks which were enhanced by putting a drop of mineral oil on the lesions. Koebner’s phenomena was present. On examination, some lesions were observed in the oral mucosa along with erosive lesions on tongue. Nails showed thinning and distal splitting of nail plates, longitudinal ridging and pterygium.

ALichen planus
BLichenoid eruption
CLichen nitidus
DDLE
Unknown
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945 Unknown

A 50-year-old chronic alcoholic presented with complaints of acute confusion, delirium, ataxia and mild memory loss. On ophthalmoscopic examination, ophthalmoplegia was noted along with hypotension. Serum electrolyte levels were normal. Lab findings revealed increased RBC transketolase activity along with reduced blood lactate levels. CT scan of the brain did not reveal any finding, so MRI of brain was planned. Which of the following enzymes uses the above deficient vitamin as a coenzyme: –

APyruvate dehydrogenase
BTransaminase
CXanthine dehydrogenase
DOrnithine decarboxylase
Unknown
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