For 10 pointsÂ—name this Himalayan state of India located just west of Bhutan.
The "listening ears pass," or Nathu La, is on the northern border of this region. British botanists Joseph Dalton Hooker and Archibald Campbell were arrested for unauthorized intrusion into this territory, whose traditional monarch was known as the (*)  "chogyal." A 1975 referendum abolished its monarchy after a series of riots in the city of Gangtok. Indigenous people here include the Lepcha and the Bhutia, who call it the "hidden valley of rice." ► Kangchenjunga, the world's third tallest mountain, is on the border between this region and Nepal. For 10 pointsÂ—name this Himalayan state of India located just west of Bhutan.
The "listening ears pass," or Nathu La, is on the northern border of this region.
Sikkim