Statement I : When range of a projectile is maximum, its angle of projection may be ${45}^0 or {135}^0$.

Statement II : Whether $\theta is {45}^{0 }or {135}^0$, value of range remains the same, only the sign changes.

If both statement I and statement II are true and statement II is the correct explanation of statement I
 

If both statement I and statement II are true but statement II is not the correct explanation of statement I
 

If statement I is true but statement II is false
 

If both statement I and statement II are false.