MSFinals-1000

MSFinals-1000

A 35-year-old hypertensive man presented with the following blood results:
Investigation Result Normal value
Sodium (Na+) 147 mmol/l 135–145 mmol/l
Potassium (K+) 2.8 mmol/l 3.5–5.0 mmol/l
Urea 4.0 mmol/l 2.5–6.5 mmol/l
Creatinine 50 μmol/l 50–120 μmol/l
Glucose 4.0 mmol/l
Random: 3.5–5.5 mmol/l
Fasting: <7 mmol/l
Hba1c: <53 mmol/l (<7.0%)
Which of the following is the most likely diagnosis?