Three brands of pens A, B and C are available in packets of 10, 12 and 24 respectively. If a shopkeeper wants to buy equal number of pens of each brand, what is the minimum number of packets of each brand, he should buy?

• A. A = 10, B = 12, C = 5
• B. A = 5, B = 12, C = 10
• C. A = 10, B = 5, C = 12
• D. A = 12, B = 10, C = 5