The age of Saurabh, Kabir and Sudesh are in ratio of 12 ∶ 15 ∶ 25. If sum of the age of all three is 312, then find the ratio between the age difference of Kabir and Saurabh and the age difference of Sudesh and Kabir.
1
3 ∶ 11
2
5 ∶ 11
3
4 ∶ 10
4
3 ∶ 10
5
None of these