Which of the following statements on the use of X-rays is incorrect? X-rays are used
-
A.
in hospitals to obtain photogaphs of tissues and bones in the body -
B.
for the treatment of malignant growths like cancer cells -
C.
in detecting fingerprints -
D.
to reveal hidden flaws in metal castings and welded joints -
E.
to detect alternations which have been made to works of art