What Was The Exact Wording On The Sign Above Jesus’ Head?

Alleged contradiction:
What was the exact wording on the cross?
(a) “This is Jesus the King of the Jews” (Matthew 27:37)
(b) “The King of the Jews” (Mark 15:26)
(c) “This is the King of the Jews” (Luke 23:38)
(d) “Jesus of Nazareth, the King of the Jews” (John 19:19)
This accusation assumes that each gospel writer was required to be exactly precise in his reporting.
A second key point to keep in mind, however, is that all four gospel writers report in agreement that the sign had the words, “The king of the Jews”, at a minimum.