"Who is responsible for providing the the information under RTI Act, in the case of Meghalaya, where in each and every District there is District Information Officer and District Information & Public Relation Officer, if the information is filed, was meant in the Office of the District Institute of Educational Training and to whom shall I file the Application."
Just check for the exact department you want or the department under which your Public Authority is categorised under.
2. Please remember that your application to any Public Authority operating under the State Government has to be as per the Meghalaya RTI Rules. From the following link, it can be seen that all rules in Meghalaya are the same as Central Rules for RTI: