Medicine A smoker presented with altered sensorium. His blood osmolality was found to be 240 and urine osmolality 340. His Na+ is 122 meq/L. The diagnosis is A Diabetes insipidus B SIADH C Renal tubular acidosis D Cerebellar degeneration 💡 Explanation A smoker presented with altered sensorium. His blood osmolality was found to be 240 and urine osmolality 340. His Na+ is 122 meq/L. The diagnosis is ✓ Correct Answer: B. SIADH