<prompt> In pregnancy following change takes place -Tidal volume increaseArterial p02 decreaseCardiac output decreaseRespiratory acidosis  <response>: Ans. is a i.e., Tidal volume increase Respiratory changes during pregnancyo TLC is reduced by 5o Subcostal angle increases from 69 to 103.o Tidal volume increases.o PaCO2 fall from 38 to 32 mnvhg PaO2 rises from 95 t0 105 mmhgo Pregnancy is a state of respiratory alkalosis.o Cardiac output increases during pregnancy, already explained 