The question asks how to characterise a document where A sells his house to B for a stated price, with a clause in the same document letting A recover the house by repaying within three years, failing which the sale becomes absolute. Testing each option against Section 58(c) of the Transfer of Property Act, 1882 resolves this.
Because the reconveyance condition sits in the same document as the sale, Section 58(c) governs, and the transaction is a mortgage by conditional sale requiring foreclosure, not a void, absolute, or leasehold arrangement.
Therefore, the correct answer is It is a mortgage by conditional sale; B must seek foreclosure through court.