Is income tax leviable on property inherited from mother

1.What is tax implications on house property inherited from mother who bought it in 1950 and now sold by us in Feb  2021?

2is any income tax applicable  or is such inherited property exempt from tax?

1.We inherited it in 2018.  Is income tax applicable on capital gains from its sale ? At what rate?

How to calculate its capital gains ? Formula With indexation that is applicable?

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