Arian Passenger Payload Experiment (APPLE) was launched in _________.

NCERT (2026-27): “India has also made great strides in satellite development. Aryabhatt was launched on 19 April 1975, Bhaskar-I in 1979 and Rohini in 1980. On 19 June 1981, APPLE (Arian Passenger Payload Experiment) was launched through Arian rocket.”