A, B, C started a business with their investments in the ratio 1:3 :5. After 4 months, A invested the same amount as before and B as well as C withdrew half of their investments. The ratio of their profits at the end of the year is :

• 1 : 2 : 3
• 3 : 4 : 15
• 3 : 5 : 10
• 5 : 6 : 10