I→P,II→Q,III→R,IV→T
I→P,II→R,III→T,IV→U
I→T,II→Q,III→R,IV→U
I→P,II→Q,III→T,IV→U
Correct option is C. I→P,II→Q,III→T,IV→U Case 1. L=L₀, T=T₀, f=f₀ f₁=1/(2L₀)√(T₀/μ) Case 2. L=(3L₀)/2 f₂=(3/2)×(1/(3L₀/2))√(T₂/(2μ))=f₀ ⇒f₀=1/(2L₀)√(T₂/(2μ)) ⇒T₂=T₀/2 Case 3. L=(5L₀)/4 f₃=(5/2)×(1/(5L₀/4))√(T₃/(3μ))=f₀ ⇒f₀=2/(3L₀)√(T₃/(3μ)) ⇒T₃=(3T₀)/16 case 4. L=(7L₀)/4 ⇒f₄=(14/2)×(1/(7L₀/4))√(T₄/(4μ))=f₀ ⇒f₀=2/(L₀)√(T₄/(4μ)) ⇒T₄=T₀/16