Cost of acquisition

Dear all,

Where the immovable property rural agriculture land(A) tranfered by way exchange to another rural land(B) for without consideration before 1st oct 2009 and subsequently sold .

what will be the cost of acquisition in above transction ?
I found found following ref. is it correct?

Ref: Where the asset was acquired by way of exchange for another asset, the cost of .acquisition is the fair market value of that other asset as on the date of exchange.
Pl quote ref with particular section of IT act.

Thanks in advance for reply.

AK