The room temperature charges by a small amount from `T` to `T+DeltaT` (on Kelvin scale). The fundamental frequency of organ pipe changes from `f` to `f+Deltaf`, then

Answer

A

Explanation

We know that `fpropsqrtT`
According to the questioin
`f+/_\fprop sqrt(/_\T+T)`
`rarr (f+/_\f)/f=sqrt(/_\T+T)/T)`
`rarr 1+(/_\f)/f=(1+(/_\T)/T)^(1/2)`
`=1+1/2 (/_\T)/T`
`……. (neglecting other terms) `
`rarr (/_\f)/f=(1/2)(/_\T)/T`