Correct : a,c,d

Explanation:
1. Statement (a) is True: HTTP 1.1 uses persistent connections by default. This allows a browser to download multiple objects (like images, CSS, or JS files) belonging to the same webpage over a single, reused TCP connection, provided those objects reside on the same server.
2. Statement (b) is False: A single TCP connection is established between a specific client and a specific server IP address. It is physically impossible to download objects from different web servers over the exact same TCP connection.
3. Statement (c) is True: HTTP 1.1 supports a feature called pipelining. This allows the client to send multiple HTTP requests over the same persistent TCP connection sequentially without waiting for the corresponding responses to return.
4. Statement (d) is True: Persistent connections in HTTP 1.1 are not limited to a single webpage. A client can download files from entirely different webpages over the same TCP connection, as long as they are hosted on the same server.