question_answer

A retailer has n stones by which he can measure (or weigh) all the quantities from 1 kg to 121 kg (in integers only. e.g., 1 kg, 2kg, 3 kg, etc.) keeping these stones on either side of the balance. What is the minimum value of n?

A)  3                    

B)  4             

C)  5                    

D)  11