I have a land situated in rural area of India.This land is donated by my mother.In the B1 khasra naksha of this land it is mentioned as agricultural land.The distance of this land from municipality limit is more than 10kms.The total population of the village in which land is situated is around 2500people as per 2011 census.We have not done any agricultural activity in this land up till now .what will be the capital gain tax if I want to sell this land and how can I save my tax

I have a land situated in rural area of India.This land is donated by my mother.In the B1 khasra naksha of this land it is mentioned as agricultural land.The distance of this land from municipality limit is more than 10kms.The total population of the village in which land is situated is around 2500people as per 2011 census.We have not done any agricultural activity in this land up till now .what will be the capital gain tax if I want to sell this land and how can I save my tax