Consider the following statements regarding Indian money market instruments:

1. Commercial Paper is a short-term, unsecured promissory note issued by companies.

2. Certificate of Deposit is a long-term instrument issued directly by the Reserve Bank of India to corporations.

3. Call Money refers to short-term finance used for transactions between banks.

4. A Zero-Coupon Bond pays periodic interest to its holder at a fixed coupon rate.

Which of the statements given above are correct?