I am the official currency of a country that is home to the world's tallest mountain and has a unique flag. This currency is pegged to the Indian Rupee. What am I?

1. My country is landlocked and located in South Asia.
2. I am divided into 100 paisa.
3. My value is closely tied to the currency of my neighbor to the south.
4. My country's capital city is Kathmandu.