Which of the following is true for center of mass ?
(i) The center of mass of a body may lie within , outside , on the surface of the body.
(ii) In the case of symmetrical bodies , the center of mass coincides with the geometrical center of the body.
(iii) In the absence of external forces , the center of mass moves with constant velocity.
(iv) If external forces are absent and system is initially at rest, then location of center of mass is fixed.
A. `(i) ,(ii)`
B. `(i) ,(ii) ,(ii)`
C. `(ii) ,(iii) ,(iv)`
D. all options are correct
