C-12-Q065mediumsingle_mcqWhich of the following is true in △ABC\triangle ABC△ABC?aAB⃗+BC⃗=CA⃗\vec{AB}+\vec{BC}=\vec{CA}AB+BC=bAB⃗+AC⃗=BC⃗\vec{AB}+\vec{AC}=\vec{BC}AB+ACcCB⃗+BA⃗+CA⃗=0⃗\vec{CB}+\vec{BA}+\vec{CA}=\vec{0}CB+BAdAB⃗+BC⃗+CA⃗=0⃗\vec{AB}+\vec{BC}+\vec{CA}=\vec{0}AB+BC