If_‘k’_is_coefficient_of_air_resistance,_‘A’_is_frontal_area_projected_by_the_vehicle_in_square_metres_and_‘V’_is_vehicle_speed(in_km/h)_then_the_expession_for_air_resistance_‘A.R’_on_the_vehicle_is$#

• A. A.R = k*A*V^2
• B. A.R = k*A*V^3
• C. A.R = 2k*A*V
• D. A.R = k*A*V