What major engine milestone did ISRO achieve in March 2025?
Flight acceptance hot testing of the CE20
In March 2025, ISRO successfully completed the flight acceptance hot test of the CE20 cryogenic engine, which powers the upper stage of the LVM3 launch vehicle.
The CE20 is an indigenous cryogenic engine using liquid oxygen and liquid hydrogen, and this hot test validated the engine's readiness for an upcoming flight.
The other options describe an ion engine test, a nuclear-based rocket engine and a solar electric propulsion demo, none of which match this March 2025 achievement.
Hence, the milestone was the flight acceptance hot testing of the CE20.
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