The figure below shows four isotropic solids having positive coefficient of thermal expansion. A student predicts that on heating the solid following things can happen. Mark true (T) or False (F) for comments made by the student.

(i) The angle a in figure (a) will not change.

(ii) The length of line in figure (b) will decrease.

(iii) The radius of inner hole will decrease.

(iv) The distance AB will increase.