Reliance Communication demerger price

This discussion explores the challenge of determining the original demerged price for Reliance Communication (R Com) shares received as a gift. The original poster wishes to sell these shares to book a long-term capital loss (LTCL) but cannot locate the initial cost basis. They are considering using the demerged price as the cost basis but are encountering issues with historical pricing and the grandfathered price on 31st Jan 2018, which impacts the potential tax benefit.