Q61,paper 3, d13. Which of the following is not true with respect to a trackball and/or spaceball ?

I. A trackball is a two dimensional positioning device while as a spaceball provides six degrees of freedom.

II. Unlike the trackball a space ball does not actually move.

III. A trackball is a three dimensional positioning device

while as a spaceball provides six degrees of freedom.

(A) I & II 

(B) II & III

(C) II only

 (D) III only 

Answer D