These questions are based on the following set of numbers.
538 687 239 764 848
If all the second digits of the numbers are reduced by 2 and then increased by 1 and arranged in ascending order after that how many digits will appeared 2 or more than 2 times in the whole series?
A One B Two C Three D Four E five
528,677,229,754,838 digit who appeared 2 or more time in the series is 2,5,8,7