A, B and C start a business and the ratio of their investment is 8 : 5 : 3. If at the end the ratio of their profits is 4 : 15 : 6, then what is the ratio of time period of their investment?

• 1 : 6 : 5
• 2 : 3 : 4
• 1 : 6 : 4
• 2 : 6 : 3