Almost half of U.S. adults aged 35–44 years have gingivitis. Approximately one-half of the U.S. population has periodontitis
A) Both statements are true.
B) Both statements are false.
C) First statement is true, second statement is false.
D) First statement is false, second statement is true.
C
Explanation: C) According to Brown and Loe, approximately one-fourth of the U.S. population has periodontitis.
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