Explanation:
The correct answer is B: Chandrayaan-3. India became the first country to achieve a successful soft landing near the Moon's south pole through the Chandrayaan-3 mission. Launched by the Indian Space Research Organisation (ISRO), Chandrayaan-3's Vikram lander touched down on August 23, 2023, at approximately 69°S latitude, marking a historic milestone. This made India the fourth nation overall to soft-land on the Moon (after the Soviet Union, the United States, and China) but the first to do so in the challenging lunar south polar region. The south pole is scientifically significant due to permanently shadowed craters that may contain water ice, essential for future lunar exploration, resource utilization, and sustained human presence. Why the other options are incorrect: A: Chandrayaan-2 — This was India's previous lunar mission (2019), which aimed for a soft landing near the south pole with its Vikram lander. However, it failed during the final descent phase due to a software glitch and velocity error, causing the lander to crash on September 6, 2019. While the orbiter component survived and continues to provide data, no successful landing occurred, so India did not achieve the first south pole landing with this mission. C: Aditya-L1 — This is India's first solar observatory mission, launched in September 2023 and positioned at the Sun-Earth L1 Lagrange point (about 1.5 million km from Earth). It studies the Sun's corona, solar wind, and space weather—not the Moon at all. It has no connection to lunar landings or the south pole. D: Gaganyaan — This is India's upcoming human spaceflight program, aimed at sending astronauts into low Earth orbit (initially uncrewed tests, with crewed flights planned later). It focuses on orbital missions around Earth, not lunar exploration or landings. It remains in development and unrelated to Moon missions. Chandrayaan-3's success followed lessons from Chandrayaan-2's failure, incorporating improved navigation, propulsion, and redundancy systems. The mission included the Pragyan rover for surface analysis, confirming India's leadership in targeting this key lunar region amid global interest (e.g., NASA's Artemis program and others). This achievement highlights India's growing space capabilities on a modest budget.