Such information can be obtained by submitting an application under Right to Information Act, 2005. In case it is not sure as to whom to address such applications then, in the case of the states the application may be sent to the Chief Secretary of the state concerned who will forward the same to the department concerned. On the website of each Government organization/department, full contact details are provided under RTI section.
In the case of the central Government, the application may be sent to the cabinet secretariat, in case it is not clear to whom to send the application. Generally, required information is furnished within 30 days in case transfer of the application from one organization to another organization is not involved.