Which one of the following is the CORRECT chronological order (earliest in time to latest) of the packets leaving the computer ?

To fetch the web page, the sequence of events is as follows:

1. (ii) DNS request: Since the DNS cache is empty, the client must first resolve the server's domain name to an IP address by sending a DNS query.

2. (iv) TCP SYN: Once the IP address is known, the client initiates the 3-way handshake to establish a TCP connection with the web server by transmitting a TCP SYN packet.

3. (i) HTTP GET request for the index page: After the TCP connection is established, the browser requests the base HTML document (index page).

4. (iii) HTTP GET request for an image object: The browser parses the received index HTML, finds the references to embedded images, and sends subsequent HTTP GET requests to fetch the images over the existing TCP connection.

Hence, the correct chronological order is (ii) $\rightarrow$ (iv) $\rightarrow$ (i) $\rightarrow$ (iii), which corresponds to (C).