How many states have a code number of 2?
There are 3 states that have a code number of 2: 

1. Madhya Pradesh (entry 10 in the original text, renumbered to entry 11 by the Bihar Reorganisation Act, 2000)
2. Punjab (entry 15 in the original text, renumbered to entry 16 by the Bihar Reorganisation Act, 2000)
3. Rajasthan (entry 17 in the original text, renumbered to entry 18 by the Andhra Pradesh Reorganisation Act, 2014)