After death of parents (Father died in 1983 & Mother died in 1991) with out any will, an ancestral property (house) is transferred to the legal heirs two sons- sonA & sonC in 1994.
The parents also have one daughterB who was already married in 1974 & thus did not get any share from the ancestral house at that time.

.) At first sonC died in 2007 with out any will ( He is unmarried).

.) Secondly sonA died in 2011 with out any will (He is married and his widow and two children are alive. These two children are not married yet).

.) DaughterB is alive (She is married but widowed in 1987 and her three children are alive. These three children are married).

My question is-
.)The part/share of the ancestral property(house) in the name of deceased sonC will be transferred to whom now – Whether to the postdeceased sonA’s family or alive widowed daughterB or both?
.) If succession certificate be applied then who will be the successor of deceased unmarried sonC? [Religion is hindu]