mutation on property?

Yes but if they prove that the joint family funds are utilised for purchase of such property, though the proprerty is in individual name, whose name appears to be self acquired.

In response to your query,

The right to challenge is definitely available to all of them but that doesn't mean that they are definitely going to succeed. The court will try to find out if the case valid by identifying if the property is self acquired or inherited from ancestral property. But if the property is self acquired then you have nothing to worry about just provide the relevant documents to establish that the property is self acquired and the case will go in your favor. 

Regards,

Aryan Raj 

Hii

In case of Mutation first you need to understand Mutation does not give Ownership Rights Neither it gives Information regarding Clear Titles of Land Records.

The legal heirs can only challenge when there is deficiencies or irregularities in Documents or some fraud has taken place the burden of proof lies with them which they have to prove in Court.

Regards

Advocate Pallabh Haldar