Subject :ICSO Class : Class 5
Which of the following devices has a cylindrical drum called a photo receptor?
A 
B 
C 
D 
Ans 1:
Class : Class 6
I thought it's a but it's wrong
Ans 2:
Class : Class 7
Ans 3:
Class : Class 6
Ans 4:
Class : Class 7
I thought it was A
Ans 5:
Class : Class 5
I still think, it is A. The answer is wrong !!
Ans 6:
Class : Class 5
Ans 7:
Class : Class 6
Ans 8:
Class : Class 7
I thought that it was A .