Rinne's test is negative if minimum deafness is -: (A) 15-20 dB, (B) 25-30 dB, (C) 35-40 dB, (D) 15-50 dB
Answer is A. As discussed in the text in Rinnies test—air conduction of the ear is compared with its bone conduction.
Hence there is false negative Rinne test (BC > AC).