Can anyway help check my explanation to the question?
for (a) , |R3| = |R2|
R2 sinθ = 30
=> R2 > 30
So (a) is correct
For (b)
R5 = 120 + R3cosθ
= 120 + 30cosθ > 150
So (b) is incorrect
For (c) since R2 and R3 are action and reaction pair, R2sinθ = R3 sinθ
Consider the whole system, R1 + R3 = R2+R4
So R1 = R4
for (d), Hmm.. don't know how to explain... But i know they form an action and reaction pair...

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wat is ur answer?

if you're asking 'is', then it is B, but for 'was', it was 'A'

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