Which one is the correct conditional sentence?

উত্তর জানতে একটি অপশন বেছে নাও 👇

• কIf I were a doctor, I treated the patients free of cost
• খIf I were a doctor, I would treat the patients free of cost
• গIf I were a doctor, I would have treated the patients free of cost
• ঘIf I were a doctor, I shall treat the patients free of cost