Validity of GIFT deed over WILL Deed

In a case where a prsn say DONER executes a WILL deed to say a 1st prsn 'A' & after sometime, he executes a registered gift deed & reg.WILL deed to a 2nd prsn say 'B'. And Agn the DONER executes a will deed to a THIRD prsn say 'C' for the same property. The gift deed to 2nd prsn'B' is not challenged anywhere frm 2003 to till date by the DONER & the DONER died in year 2005 (2 yrs after the execution of gift deed). Prsn A & C filled probate in High Court.& prsn B who got gift is caveator in the same. So plzzz suggest me any judgement or citation stating gift deed validity over will deed.