Digital Subtraction Radiography (DSR)is Being Used in the Diagnosis of Periodontal

Digital subtraction radiography (DSR) is being used in the diagnosis of periodontal disease and bone regeneration.Two exposures are taken at different intervals,and the changes in bone density that occurred during the interval are measured.

A) Both statements are TRUE.
B) Both statements are FALSE.
C) The first statement is TRUE, and the second statement is FALSE.
D) The first statement is FALSE, and the second statement is TRUE.