Correct option is A
Here's the order of the listed dignitaries:
1. Former Presidents (Rank 3): They rank very high, just below the President and Vice-President.
2. Speaker of Lok Sabha (Rank 7): The Speaker of the Lok Sabha holds a significant position.
3. Former Prime Ministers (Rank 7A): Former Prime Ministers are ranked after the Speaker.
4. Judges of Supreme Court (Rank 9): Supreme Court Judges are below the higher political and constitutional functionaries.
5. Solicitor General (Rank 23): The Solicitor General is a law officer and ranks much lower than the above.
So, the chronological order from highest to lowest rank is:
A. Former Presidents (Rank 3)
B. Speaker of Lok Sabha (Rank 7)
C. Former Prime Ministers (Rank 7A) - Note: Rank 7A is below Rank 7.
D. Judges of Supreme Court (Rank 9)
E. Solicitor General (Rank 23)
Therefore, the correct arrangement is A, B, C, D, E.