Explanation
Why Correct: Junko Tabei, a Japanese mountaineer, became the first woman to reach the summit of Mount Everest on May 16, 1975. She led an all-women expedition and ascended via the Southeast Ridge route.
Distractor Analysis: Bachendri Pal was the first Indian woman to climb Everest, achieving this in 1984, nearly a decade after Junko Tabei. Sudipta Sengupta is an Indian mountaineer and geologist who participated in the first Indian expedition to Mount Everest in 1984 but did not summit; she is also known for her work in Antarctica. Melissa Arnot is an American mountaineer who holds the record for the most summits of Everest without supplemental oxygen by a woman, but she is not the first woman overall.
Takeaway: The first woman to climb Mount Everest was Junko Tabei (Japan, 1975). The first Indian woman was Bachendri Pal (1984). Remember the chronological order and nationalities: Junko Tabei (first woman), Bachendri Pal (first Indian woman), Melissa Arnot (most summits without oxygen).