Four A's of P.R
An adviser or advisor is normally a person with more and deeper knowledge in a specific area and usually also includes persons with cross functional and multidisciplinary expertise. An adviser's role is that of a mentor or guide and differs categorically from that of a task specific consultant.
An advocate is , who understand the policy division of an organisation on the one hand and the people on the other hand in communicating policies in the court of public opinion . He diseminates information to the public in a two way traffic.
In public relation antenna helps in researching and evaluating programmes of action and communication on a continuos basis and to achieve inform public understanding to the success of organisational goals.