On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (?P/?V)s and the slope of the reversible isothermal line (?P/?V)T are related as (where, y = Cp/Cv) ?

A. (?P/?V)S = [(?P/?V)T]Y

B. (?P/?V)S = y(?P/?V)T

C. (?P/?V)S = (?P/?V)T

D. (?P/?V)S = 1/y(?P/?V)T

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