how was he related to indian music?
He was interested in sitar and used it in a song which triggered a phenomenon called ' The Great Sitar Explosion of 1966-67'
George Harrison
Harrison became fascinated with the sitar and immersed himself in Indian music. According to Lavezzoli, Harrison's introduction of the instrument on the Beatles' song "Norwegian Wood" "opened the floodgates for Indian instrumentation in rock music, triggering what Shankar would call 'The Great Sitar Explosion' of 1966–67". Lavezzoli recognises Harrison as "the man most responsible for this phenomenon".
what is referred as wonderwall music? Its a solo album and a soundtrack to a film. whose album? George Harrison. and in which film it was used? "Wonderwall". when was the album released? November 1968. in which band did the above person work during early years? The Beatles. what was his role in this band? Guitarist. was he part of any show for bangladesh? Yes, the charity event, The  Concert for Bangladesh. what charity was it for? To raise money to aid starving refugees during the Bangladesh Liberation War.
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George Harrison [SEP] Sitar and Indian music
He initially stayed in Bombay until fans learned of his arrival, then moved to a houseboat on a remote lake in Kashmir. During this visit, he also received tutelage from Shambhu Das, Shankar's protégé. Harrison studied the instrument until 1968, when, following a discussion with Shankar about the need to find his "roots", an encounter with Clapton and Jimi Hendrix at a hotel in New York convinced him to return to guitar playing. Harrison commented: "I decided ... I'm not going to be a great sitar player ... because I should have started at least fifteen years earlier." Harrison continued to use Indian instrumentation occasionally on his solo albums and remained strongly associated with the genre.