i think its a# correct me if i am wrong.
that's a tricky one, let me check my alphabet cheat-sheet
C, B, A#/Bb. That took a thread?
are you kidding me? are you by any chance in your 10th year of kindergarten?
Yes, if you drop everything from Drop C one whole step, you have Drop Bb (or A# whatever you want to call it)
Made my day.