C-12-Q086mediumsingle_mcqFor non-zero vectors a⃗\vec{a}a and b⃗\vec{b}b, the relation a⃗=mb⃗\vec{a}=m\vec{b}a=mb holds if and only ifaa⃗=b⃗\vec{a}=\vec{b}a=bba⃗∥b⃗\vec{a}\parallel\vec{b}a∥bca⃗⊥b⃗\vec{a}\perp\vec{b}a⊥bd∣a⃗∣=∣b⃗∣|\vec{a}|=|\vec{b}|∣a∣=∣b∣