Given, air pressure, p0=10135pa and pressure at the centre of rarefaction, p1=91000Pa As we know that, during the propagation of sound wave in air pressure varies as
Thus, we have p1=p0−dp 91000=101325−dp(putting values) ∴dp=101325−91000 =10325Pa Thus, the pressure at the centre of compression. p1=p0+dp =101325+10325 =111650Pa Therefore, the most appropriate option is (c).