200460
C. amphibeus is native only to the Chel River ( in the drainage of the Brahmaputra ) , of the Bhutan foothills , in northern Bengal , India .
 Bhutan, India
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bhutan, India