What is the order in which the castle system has changed in India placed the first development at the top of the most recent developments at the bottom?(a) castles are rigid and inflexible. People are born into a castle and cannot leave.(b) discrimination based on castle is determined to be illegal.

The correct order of the castle system developments in India is as follows:

1. Castles are rigid and inflexible. People are born into a castle and cannot leave.
2. Discrimination based on castle is determined to be illegal.

Therefore, (a) should be placed at the top as the first development, and (b) should be placed at the bottom as the most recent development.