Correct Answer: Option B

Explanation

Horizontal range = 3 x maxi. height
=> (U²Sin2θ) / g = (3 x U²sin²θ) / 2g

∴sin2θ =	3sin2θ
	2

=> 2sinθcosθ =	3sin2θ
	2

∴ 4sinθcosθ = 3sin²θ
=> 4cosθ = 3sinθ
∴ ^sinθ/_cosθ = ⁴/₃; => tanθ = ⁴/₃ = 1.3333
θ = tan^-1 (1.3333)
= 53^o

There is an explanation video available below.

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