The eluate from a HPLC with a flow rate of 1.2 ml/min enters a mass spectrometer through an APCI interface at pressure o

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The eluate from a HPLC with a flow rate of 1.2 ml/min enters a
mass spectrometer through an APCI interface at pressure of 101 kPa
and 27oC. If the ion source of the mass spectrometer is at a
pressure of 1.0x10-5 kPa and a temperature of 225oC, the pumping
capacity of the of the system is:
a) 2.0 m3 s-1.
b) 12.0 m3 s-1.
c) 1.7 m3 s-1.
d) 23.4 m3 s-1.