A Public Information Officers can refuse information on certain subjects. These include information received in confidence from foreign governments, information prejudicial to security, strategic, scientific or economic interests of the country, breach of privilege of legislatures, etc.
For an average citizen like you and me, the information we are looking for does not come under these categories. So the PIO can not refuse to give us information.
The Right to Information Act (RTI) is an Act of the Parliament of India“to provide for setting out the practical regime of right to information for citizens” and replaces the erstwhile Freedom of information Act, 2002. The Act applies to all States and Union Territories of India except Jammu & Kashmir.
Information is any material in any form. It includes records, documents, memos, e-mails, opinions, advices, press releases, circulars, orders, logbooks, contracts, reports, papers, samples, models, data material held in any electronic form. It also includes information relating to any private body which can be accessed by the public authority under any law for the time being in force.