R2=16h1h2
R2=h1h2
R2=2h2h2
R2=4h1h2
Correct option is B. R²=16h₁h₂
For same range angle of projection will be θ and 90-θ
R = u²/g * 2sinθcosθ
h₁ = u²sin²θ/g
h₂ = u²sin²(90-θ)/g = u²cos²θ/g
R² = (u⁴/g²) * 4sin²θcos²θ
h₁h₂ = (u⁴/g²)(sin²θcos²θ)
R² = 4(u⁴/g²)(sin²θcos²θ) = 16h₁h₂