First company issues debentures ->
issue of debentures is (C)
Then company creates DRR ->
creation of DRR is (B)
After that redemption becomes due ->
redemption becomes due is (D)
Lastly company pays to debenture-holders ->
payment to debenture-holders is (A)
So sequence is (C), (B), (D), (A)
The correct answer is option 4.