The ratio of the present ages of Manthan and his mother is 3 ∶ 7 respectively and the ratio of the present ages of Manthan and his father is 5 ∶ 14 respectively. What is the respective ratio between the present ages of Manthan's mother and his father ?
1
5 ∶ 7
2
7 ∶ 9
3
3 ∶ 5
4
5 ∶ 6