A certain sum of money is made up of Re. 1, 50 paise and 25 paise coins. The ratio of the number of these coins is 2.5 : 3 : 4. Then, 3/5th of the Re. 1 coins are changed to 50 paise and 25 paise coins, such that the ratio of the total number of these coins in the same order became 1 : 2. Now, half of the 50 paise coins are changed to Re. 1 coins and all the 25 paise coins are changed to Re. 1 and 50 paise coins in the ratio 7: 4. What is the ratio of the Re. 1 and 50 paise coins at the end of the conversions?​

1) 11:23
2) 16:13
3) 54:71