A 35 year old man presented with hematuria, abdominal swelling and has a BP of 190/140. What is the most diagnostic investigation?

The key is B. USG. [The diagnosis is ADPKD. Autosomal dominant polycystic kidney disease (ADPKD) is a genetic disorder characterized by the growth of numerous cysts in the kidneys. It is the most common inherited disorder of the kidneys. Symptoms usually develop between the ages of 30 and 40, but they can begin earlier, even in childhood.  Haematuria, abdominal swelling and raised BP are the most common findings. USG diagnostic criteria is: Age 18 – 39 yrs>3 unilateral or, bilateral cysts, 40 – 59 yrs >2 cysts in each kidney, >60 yrs >4 cysts in each kidney].