Of the Following,which Are Disadvantages of Using Pocket Ionization Chambers

Multiple Choice

Of the following,which are disadvantages of using pocket ionization chambers as personnel dosimeters?
1) They can discharge if they are subjected to mechanical shock.
2) Because these devices provide no permanent legal record of exposure,health care facilities that use this method to record personnel exposure must delegate someone to keep such a record.
3) If not read each day,the dosimeter may give an inaccurate reading because the electric charge tends to escape.

A) 1 only
B) 2 only
C) 3 only
D) 1,2,and 3