Who was the first man to climb Mount Everest without Oxygen?
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The first man to climb Mount Everest without Oxygen was "Phu Dorji". He completed his journey of Everest on May 9, 1984. His nationality was Nepali, but was from India. He was born on 25 January 1984. Phu Dorji died in May 1987 in the Kanchanjunga Expedition of Assam Rifles.
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