Retail management is basically a managerial course.You have a law degree which you can possibly use as a basic graduate degree for the specialisation.A degree in law will definitely help understand the intricacies of management but you will also have to be ready to brush up your mathematical skills as you are likely to have related subjects.Check out the papers offered and take a suitable decision.

a body maintains its current state (inertia)untill and unless acted upon by an external force.

yes CLAT

(logical reasoning) it includes analogy,statement&arguments,statements-assumptions,statement-conclusion ,deriving conclusion from passsages