Which of the following statements are true

A. $\vec{a}$ and $\vec{b}$ are always collinear.

B. Two collinear vectors are always equal in magnitude.

C. Two vectors having the same magnitude are equal

D. Two collinear vectors having the same magnitude are equal.

E. If $\vec{P}$ is a unit vector along line 'l' then the projection of vector $\vec{a}$ on line'l' is given by $\vec{a}.\vec{p}$

Choose the correct answer from the options given below:

A and E only