Period Of holding for convertible debentures

Vedant Khanna (374 Points)

18 January 2019  
When convertible preference shares are converted into equity shares and sold,
Period of holding is taken from Date of acquisition of convertible preference shares.

Does the same apply to convertible debentures?

And of what year will the cost inflation index be?
Date of conversion or Original date of acquisition of convertible debentures/pref shares?