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1. What is Gangtok the capital of?
2. When did Gangtok become the capital of it?
This is when it became capital of the kingdom. It became a capital of the state in 1975, which is why I didn't say state in the first question.
3. What is the largest language in Gangtok?
4. What is the second largest religion in Gangtok?
Donyi-Polo is a religion in Arunachal Pradesh
5. What is the population of Gangtok?
6. When did Gangtok become a pilgrimage center?
7. What monastery lead to Gangtok becoming a pilgrimage center
8. What was the title of the monarch that resided in Gangtok?
9. What palace did the monarch live in?
It was really hard to find info on this, correct me if it's wrong
10. What mountain is visible from Gangtok?
If you want you can put the link i put in my blog in caveats to show the rest of the project