_ ‘u₁’ and ‘u₂’ are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are ‘v₁’ and ‘v₂’. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by$?

• A. e = v‚Äö√á√Ö - v‚Äö√á√á/u‚Äö√á√á - u‚Äö√á√Ö
• B. e = u‚Äö√á√á - u‚Äö√á√Ö/v‚Äö√á√Ö - v‚Äö√á√á
• C. e = v‚Äö√á√á - v‚Äö√á√Ö/u‚Äö√á√Ö - u‚Äö√á√á
• D. e = v‚Äö√á√Ö - v‚Äö√á√á/u‚Äö√á√á + u‚Äö√á√Ö