1.with reference to .... telex of 4 october we are enclosing ... payment order a)their - our b)theirs - ours c)theirs

1. With reference to their telex of 4 October we are enclosing our payment order. a) their - our
2. They will discuss the prices after they study the contract terms. a) will discuss - study
3. We are crediting their account with 500 USD now. b) are crediting
4. The fax sent to the company yesterday has not reached them. c) sent
5. We received a lot of letters and e-mails from different banks. b) received