Step 1: Indian Space Missions Overview.
ISRO's Aditya-L1 mission, focused on solar study, successfully achieved its halo orbit at the Sun-Earth L1 point.
Step 2: Option Analysis.
- (A) Gaganyaan L1: Gaganyaan is India's human spaceflight program and is not associated with the Sun-Earth L1 point.- (B) Aditya-L1: This option is accurate. Aditya-L1 is the mission dedicated to solar observation and completed its halo orbit around the Sun-Earth L1 point.- (C) Mangalyaan-L1: Mangalyaan, ISRO's Mars orbiter mission, does not involve the Sun-Earth L1 point.- (D) Chandrayaan-L1: Chandrayaan, ISRO's lunar exploration program, is unrelated to the Sun-Earth L1 point.
Step 3: Determination.
The correct identification is (B) Aditya-L1, due to its completion of an orbit around the Sun-Earth L1 point.