Who sign agreement and who given money in land deal is diffent

U can show the land sale deed. I'll be sufficient evidence. Also make sure you compute capital gains on the sale and show it in your return

As per my understanding as far as Sale Agreement is in your name..and you are disclosing capital gain /loss on sale of such property in income tax return....and paying taxes if applicable...then no question arises...

Ok, so till i have proper document ( sale deed with full amount in my name ) i shouldn't worry who is giving that money.

Yes

Pls keep in mind the provisions of benami act...a person paying on someone else could be treated as beneficial owner of that property.

what's mentioned in the sale deed? that is so and so has paid so much of amount towards sale consideration. in sale deed everything will be there such as who has paid, mode of payment, instrument number etc.. if person B's payment details are there in sale deed, then there's no issue... or less it's your onus to prove that B's payments are pertinent to sale, otherwise the payment received from B will be treated as your income under section 68 apart from capital gains