Will the shareholders be eligible for corporate action benefits if the shares are sold on the ex date/record date?

Yes, shareholders are still eligible for corporate action benefits even if they sell the shares on the ex-date/record date. This is because eligibility for the benefits of corporate actions requires shareholders to have the shares in their demat account on the ex-date/record date. 

If the shares are sold on the ex-date/record date, they will be debited from the demat account on the next day, i.e., T+1 day, and not on the same day. Therefore, the shareholders are still eligible for corporate action benefits even if the shares are sold on the ex-date/record date.

To know about any corporate actions of the current financial year, check this list.