The correct answer is: a) Prashant Tamang.
Prashant Tamang is a popular contemporary singer from Sikkim. He is known for his unique voice and his ability to sing in multiple languages, including Nepali, Hindi, and English. He has released several albums and has won numerous awards for his music.
Bipul Chettri is a popular contemporary singer from Sikkim. He is known for his soulful voice and his ability to write beautiful lyrics. He has released several albums and has won numerous awards for his music.
Karma Sherpa is a popular contemporary singer from Sikkim. He is known for his powerful voice and his ability to sing traditional Sikkimese songs. He has released several albums and has won numerous awards for his music.
Usha Uthup is a popular contemporary singer from India. She is known for her versatile voice and her ability to sing in multiple languages, including Hindi, English, and Bengali. She has released several albums and has won numerous awards for her music.
However, she is not from Sikkim.