four choices have been provided. Select the correct alternative. The food cooks faster in pressu...

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four choices have
been provided. Select the correct alternative.
The food cooks faster in pressure cooker since
(a) the pressure exerted by water vapour enclosed
in the cooker increases the boiling point of water.
(b) the pressure exerted by the water vapour
enclosed in the cooker decreases the boiling point of water.
(c) the water vapour pressure does not influence the boiling point of the water.
(d) there is no loss of heat to the surrounding as the pressure cooker is airtight.
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