Arrange the following space mission (earlier to most recent):

Radar Imaging Satellite-1

Chandrayaan-2

Mars Orbital Mission

Indian National Satellite-1A

Choose the correct answer from the options given below:

Correct option is D

Correct option: (d) — [d], [a], [c], [b]
Explanation (earlier → most recent):
· Indian National Satellite-1A (d)
· Launched in 1982.
· India’s first operational multipurpose communication satellite.
· Hence, the earliest among the given missions.
· Radar Imaging Satellite-1 (a)
· Launched in 2012.
· Earth-observation satellite using radar imaging technology.
· Mars Orbital Mission (c)
· Launched in 2013 (entered Mars orbit in 2014).
· India’s first interplanetary mission, also called Mangalyaan.
· Chandrayaan-2 (b)
· Launched in 2019.
· Lunar mission consisting of an orbiter, lander, and rover.
· The most recent among the listed missions.
➡️ Therefore, the correct chronological order is: INSAT-1A → RISAT-1 → Mars Orbital Mission → Chandrayaan-2
❌ Why other options are incorrect
· Option (a):
· Places Chandrayaan-2 before Mars Orbital Mission and INSAT-1A incorrectly.
· Option (b):
· Incorrectly places RISAT-1 as the most recent mission.
· Option (c):
· Chandrayaan-2 is not the earliest mission.
�� Key Points to Remember
· INSAT-1A (1982) → India’s first operational satellite
· RISAT-1 (2012) → Radar-based Earth observation
· Mars Orbital Mission (2013) → First interplanetary mission
· Chandrayaan-2 (2019) → Advanced lunar mission