A 45-year-old male presents with symptoms of SIADH (Syndrome of Inappropriate Antidiuretic Hormone). Which of the following laboratory findings would most likely be observed?

✓ Correct Answer: Option B

SIADH leads to excessive ADH secretion, causing water retention. This results in dilutional hyponatremia and concentrated urine (high urine osmolality) as the kidneys inappropriately reabsorb water.