Question: The space agency operating IRS-P2 had a communication satellite preceded by which experimental satellite?

Knowledge 1: IRS-P2
IRS-P2 was an Earth observation satellite launched under the NNRMS (National Natural Resources Management System) programme undertaken by ISRO. The objectives of the mission was to provide spaceborne capability to India in observing and managing the Natural Resources and utilizing them in productive manner. The satellite carried Imaging multi-spectral radiometers on board for radio sensing of the resources. [SEP] Knowledge 2: ATS-6
ATS - 6 (Applications Technology Satellite - 6) was a NASA experimental satellite, built by Fairchild Space and Electronics Division It has been called the world's first educational satellite as well as world's first experimental Direct Broadcast Satellite as part of the Satellite Instructional Television Experiment between NASA and Indian Space Research Organisation (ISRO). It was launched May 30, 1974, and decommissioned July 1979. At the time of launch, it was the most powerful telecommunication satellite in orbit. ATS - 6 carried no fewer than 23 different experiments, and introduced several breakthroughs. It was the first 3 - axis stabilized spacecraft in geostationary orbit. It was also the first to use experimentally with some success electric propulsion in geostationary orbit. It also carried several particle physics experiments, including the first heavy ion detector in geostationary orbit.
Knowledge 1: IRS-P2
IRS-P2 was an Earth observation satellite launched under the NNRMS (National Natural Resources Management System) programme undertaken by ISRO. The objectives of the mission was to provide spaceborne capability to India in observing and managing the Natural Resources and utilizing them in productive manner. The satellite carried Imaging multi-spectral radiometers on board for radio sensing of the resources. [SEP] Knowledge 2: Polar Satellite Launch Vehicle
The Polar Satellite Launch Vehicle (PSLV) is an expendable medium-lift launch vehicle designed and operated by the Indian Space Research Organisation (ISRO). It was developed to allow India to launch its Indian Remote Sensing (IRS) satellites into sun-synchronous orbits, a service that was, until the advent of the PSLV in 1993, commercially available only from Russia. PSLV can also launch small size satellites into Geostationary Transfer Orbit (GTO).
Knowledge 1: IRS-P2
IRS-P2 was an Earth observation satellite launched under the NNRMS (National Natural Resources Management System) programme undertaken by ISRO. The objectives of the mission was to provide spaceborne capability to India in observing and managing the Natural Resources and utilizing them in productive manner. The satellite carried Imaging multi-spectral radiometers on board for radio sensing of the resources. [SEP] Knowledge 2: Communications satellite
The first and historically most important application for communication satellites was in intercontinental long distance telephony. The fixed Public Switched Telephone Network relays telephone calls from land line telephones to an earth station, where they are then transmitted to a geostationary satellite.  The downlink follows an analogous path.  Improvements in submarine communications cables through the use of fiber-optics caused some decline in the use of satellites for fixed telephony in the late 20th century.

Answer: ATS - 6 (Applications Technology Satellite - 6)