This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmias 1, Subject name: Medicine
A 50-year-old diabetic patient is feeling unwell. On workup, his serum creatinine= 5.0 mg% and blood urea= 125 mg%. Urine MICRAL test is positive. Which of the following will be useful for this patient? 
Select and explain. 
A. Diuretics, B. Cardio-selective beta blocker, C. ACE inhibitor, D. Amiodarone
A: Diuretics
Answer: A: Diuretics 
Explanation: P waves -absent with bizarre wide complex qRS in lead V4, V5,and V6 Tall tented T waves which are seen with hyperkalemia, are present in all the leads. The patient is a diabetic with deranged RFT. Pt. suffering from CKD stage 4-5--> hyperkalemia-Diastolic arrest Hyperkalemia in CKD patients responds to: 1. Dietary restriction of potassium with use of kaliuretic diuretics 2. Potassium-binding resins like calcium resonium and sodium polystyrene 3. Intractable hyperkalemia requires dialysis.