Ancestral property maintainance issue

There's no obligation on B to maintain the entire property without a proper authorisation of all the shareholders. 

If he is doing it on his own interest then he cannot claim the share towards maintenance from other shareholders as a right. 

Alternately he can file a suit for partition and separate possession of his share subsequent to which he can maintain his own share of property,  let others take care of their respective share in the property accordingly after that. 

Yes.  There is no obligation to B or his son, so one can file a partition suit in civil court.

Certainly, B can file a partition suit. 

Either of the LRs of grandfather may file a suit for partition and pay taxes for his/ her share.

B had been paying the taxes/ maintenance for whole of the property since he was using it exclusively.

Till then (partition) payment of taxes/ maintenance would lie upon user of property (son of  B in this case) . He can recover from LRs of A & D, if either of them is interested in his/her share.

With due respect I say that what respected Dr. J. C. Vashista says are matters to be decided by a court of law. Son of B is maintaining the property. The heirs of A and D are not abandoning their claims. But they are not paying for the maintenance either. Son of B has not stated whether he is using or living in the property. If paying for the maintenance is in his own interest he can maintain a record of all payments made and claim the shares of the heirs of A and D in due course. If he continues in the property for 12 years he can claim the property for himself under the law of limitation. 

Maintenance /payment for maintenance is a trivial issue vis-a-vis claiming individual share in the property, which shall not affect rights of shareholder(s) when it is partitioned. 

THANK YOU EVERY ONE

You are welcome for understanding and appreciations.

You are welcome for your appreciations.