All of the Following Statements Are True About Doxycycline 20

Multiple Choice

All of the following statements are true about doxycycline 20 mg except one. Which one is the exception?

A) It is an antibiotic.
B) It has no antibacterial action.
C) It inhibits collagenase production and release from host cells.
D) It is effectively used for nine months.
E) It is used in periodontics and dermatology.