# Who among the following is named as the pioneer in the treatment of cleft palate and related problems?
A. Norman Kingsley
B. Edward H. Angle
C. Graber
D. Nance
The correct answer is A. Norman Kingsley.
Kingsley, was among the first to use extraoral force to correct protruding teeth. He was also a pioneer in the treatment of cleft palate and related problems.
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