Oh I come to know about this contest now ...

though my take is B for the obvious reasons
Extending more than forty years, Ravi
Shankar began his musical career in an unpromising group as a dancer and climaxed into virtually every honor that world could bestow.
(A) Shankar began his musical career in an unpromising group as ... wrong modifier Ravi Shankar can't be extended for 40 years.
(B) Shankar’s musical career began in an unpromising group as ... This is correct also began in is appropriate usage.
(C) Shankar’s musical career began with the unpromising group of being ... usage of being is not correct. Being is correct only when its used as verb to convey the state of being.
(D) Shankar had begun his musical career with the unpromising group of being .. Wrong as explained above
(E) the career of Shankar has begun with an unpromising group of .... has is not appropriate as we use present perfect tense in GMAT only to convey two past events.