Question

Which sentence is punctuated correctly? A. I understand that Dr Elliott earned his M.D. at Columbia University. B. I understand that Dr. Elliott earned his M.D. at Columbia University. C. I understand that Dr, Elliott earned his MD at Columbia University.

Answer 1

"B. I understand that Dr. Elliott earned his M.D. at Columbia University" has correct punctuation since these are all proper titles, although it's not uncommon to see "MD" without periods.