1. Is this enough to prove that fixed amount was spent?If it is, Why the AO not satisfied with it?What else can be given as evidence when we have given all sources to meet the expenses?
You've to state the expenses actually incurred for the usual, customary marriage expenses in your community; such as,
a) on clothes for the bride/bridegromm, relatives, family etc
b) on marriage processions,
c) on feasts,
d) on jewellery & other valuable articles;
e) on invitations- printing/delivery of the invitation cards,
f) on photography/videography,
on pre-marriage functions,
g) on post marriage functions,
h) on hall rents/accommodations, etc, etc.
For these the marriage albums/videos will give some indications. It is not enough that you state a lump sum as spent for the entire marriage functions; may your expenditure statement be as detailed as possible; do not withold relevant details. You may be having the Bills received for at at least some of these heads of expenses; if not, try to get confirmation letters /certified copies of your accounts in their books.
To explain the sources for the funds to meet these expenses, you may have to furnish a detailed statement of the receipts, with the dates, names & addresses of the fund providers, their confirmation letters explaining their own immediate sources for the funds, bank staements etc.
2.AO says that in appeal they exempt genuine cases and yours is genuine with evidences so it will be exempted ,is it right?
It depends on the extent to which you can prove that your explanation is genuine. A lot depends on the peculiar facts of each case. You may take the assistance of a good tax practitioner at the assessment stage itself.