Anshu Jamsenpa is a mountaineer from Arunachal Pradesh who holds the record for:

The correct answer is: a) First Indian woman to summit Mount Everest twice within days.

Anshu Jamsenpa is an Indian mountaineer from Arunachal Pradesh. She is the first Indian woman to summit Mount Everest twice within days. She has also climbed the Seven Summits, the highest mountains on each continent.

Option b) is incorrect because the youngest Indian to climb the Seven Summits is Arjun Vajpai.

Option c) is incorrect because the first person to summit Mount Kangchenjunga was George Band and Joe Brown in 1955.

Option d) is incorrect because the fastest ascent of Mount Kilimanjaro was by Kilian Jornet in 2011, who reached the summit in 5 hours and 56 minutes.