Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. 

Assertion A :Two identical balls A and B thrown with same velocity ' u ' at two different angles with horizontal attained the same range R. If A and B reached the maximum height ${\mathrm{h}}_1$ and ${\mathrm{h}}_2$ respectively, then $\mathrm{R}=4\sqrt{{\mathrm{h}}_1{ \mathrm{h}}_2}$
Reason R: Product of said heights ${\mathrm{h}}_1{ \mathrm{h}}_2=\left(\frac{{\mathrm{u}}^2{\sin }^2\theta }{2 \mathrm{g}}\right)·\left(\frac{{\mathrm{u}}^2{\cos }^2\theta }{2 \mathrm{g}}\right)$