The correct option is A ₹ 6540
Given
Price of refrigerator = ₹ 6000
Sales tax charged is 9%
Sales tax paid = 9% of ₹ 6000
Sales tax paid = 9100 ×6000
Sales tax paid = ₹ 540
Therefore,
Bill amount = cost of refrigerator + sales tax paid
Bill amount = ₹ (6000 + 540)
Bill amount = ₹ 6540