For 10 points each, name this note, a half step below C.
Karl Goldmark wrote his opus 8 string quartet in this note's major key. Tchaikovsky left an unfinished cello concerto in this minor key, while J.S. Bach wrote his second orchestral suite which includes a Badinerie and is scored for flute and strings in this minor key, which begins a perfect fourth above F sharp. Anton Dvorak's cello concerto is in this minor key, while this note's major chord includes D sharp and F sharp, and its minor key shares a key signature with D major. For 10 points each, name this note, a half step below C.
Karl Goldmark wrote his opus 8 string quartet in this note's major key.
{B} [accept {B}-{minor}; do not accept with “{flat}” or “{sharp}”]