If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 1547836, how many digits will appear more than once in the new number thus formed?

Information Given:
Number: 1547836
Rule:
Add 1 to each odd digit
Subtract 2 from each even digit

Digits: 1 5 4 7 8 3 6

1 (odd) → 2
5 (odd) → 6
4 (even) → 2
7 (odd) → 8
8 (even) → 6
3 (odd) → 4
6 (even) → 4

New number: 2 6 2 8 6 4 4

Digits appearing more than once:
2 (twice)
6 (twice)
4 (twice)

Total = 3 digits

Final Answer:
Three

Final Correct Option:
(D)