Which composer wrote a movement that might have a hidden text behind it, even though it is for instruments alone?
a. ludwig van beethoven
b. fanny mendelssohn hensel
c. hector berlioz
d. felix mendelssohn

It is rumored that "b. Fanny Mendelssohn Hensel" wrote a movement that might have a hidden text behind it, even though it is for instruments alone, since he often spoke of doing such a thing. This has not been confirmed, however. 

The third one would be the answer