Statement - I : (A) Units of rate of reaction are independent of order of the reaction
Statement - II :  (R) Rate of reaction is the change in concentration of reactants in unit time

Rate = $\frac{\mathrm{change} \mathrm{in} \mathrm{concentration} }{\mathrm{time} \mathrm{taken} }$

units = mole/lit/time

for any order reaction rate is defined as change in concentration per unit time 

units of rate of reaction is independent of order of reaction