Correct Answer: Option A) 1 & 2
It orbited at a height of 100 km for lunar mapping - True. Chandrayaan-1 was indeed placed in a 100 km polar orbit around the Moon for conducting detailed mapping of the lunar surface.
Scientific instruments onboard were contributed by six different countries - True. Chandrayaan-1 carried scientific payloads from multiple countries including India, USA, UK, Germany, Sweden, and Bulgaria. The mission demonstrated international collaboration with these six countries contributing various scientific instruments.
It was launched from the Thumba Equatorial Rocket Launching Station - False. Chandrayaan-1 was launched on October 22, 2008, from the Satish Dhawan Space Centre (SDSC) in Sriharikota, Andhra Pradesh. It was launched using PSLV-C11, an upgraded version of ISRO's Polar Satellite Launch Vehicle. Thumba Equatorial Rocket Launching Station (TERLS) is a different facility located in Kerala and was not used for this mission.