Consider two containers A and B containing monoatomic gases at the same Pressure (p), Volume (V) and Temperature (T). The gas in A is compressed isothermally to 81 of its original volume while the gas in B is compressed adiabatically to 1/8 of its original volume. The ratio of final pressure of gas in B to that of gas in A is
(a) 81
(b) 4
(c) 823
(d) 8