Question

In which sentence is the abbreviation written ​incorrectly?
A.
I called Dr. Hortensia because I​ wasn't feeling well.
B.
I used to watch reruns of The Honeymooners on TV.
C.
The letter was​ signed, Kristin​ Johnson, PHD.
D.
I ran into Mr. Ling on my way home today.

Answer 1

The answer (C) is written incorrectly. Doctor of Philosophy should be written as PhD (with a lower case "h"), instead of PHD.