gustav mahlers symphony no.8\nwas commissioned by the king of austria.\nwas based on a tune he heard at a…

Answer:

None of the above options are correct. Gustav Mahler's Symphony No. 8 was not commissioned by the King of Austria, nor was it based on a tune heard at a carnival, and it did not receive immediate acclaim (it was a complex and large - scale work that had a more mixed initial reception).

Brief Explanations:

Mahler's Symphony No. 8 has its own unique commissioning history, musical sources, and reception context that do not match the given statements.