Which word and punctuation mark corrects the punctuation error in this sentence?
My appointment is at 3 P.M. with Dr Russell Brown, M.D.
A.
P.M.,
B.
Dr.
C.
M,D
My appointment is at 3 P.M. with Dr Russell Brown, M.D.
A.
P.M.,
B.
Dr.
C.
M,D