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Rajrupa and Aparupa from Oxford cbse, bangalore

Subject :ICSO Class : Class 3

I am a device like a mouse. Instead of having a ball at the bottom, I have a ball at the top.
A
B
C
D

b is correct

Ans 1:

Vighnesh from DYPIS, Navi Mumbai

Is it C or D? I had selected C. My ICT teacher never told me about the light pen.

HARDIK JANA from BIRLA HIGH SCHOOL MUKUNDAPUR, Kolkata

c is more appropriate answer

Rajrupa and Aparupa from Oxford cbse, bangalore