Which of the following request methods are defined in HTTP1.0?

A, C and D.

The methods defined by the HTTP/1.0 specification are GET, HEAD, and POST. The additional methods accepted on HTTP/1.0 requests inbound to CICS are PUT, DELETE, LINK, UNLINK, and REQUEUE.

Hi simon.waweru,
The answer is ACD.
GET is a request for information located at a specific place (i.e. a Universal Ressource Identifier, URI). URIs are basically URLs.
The POST method allows client request data to be sent to the server. Note that a client can also send data to the server by appending it to the URL of a GET request 
The HEAD method works like GET but is only used to retrieve document or ressource header information (e.g. contents inside the of HTML document.