MCQ
$CAD$ stands for
- ACarotid Arterial Dysfunction
- BCerebral Artery Dysfunction
- ✓Coronary Artery Disease
- DCalcium Activated Disease
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$(a)$ Contraction of diaphragm
$(b)$ Contraction of external inter-costal muscles
$(c)$ Pulmonary volume decreases
$(d)$ Intra pulmonary pressure increases

$I.$ partial pressure of $O_{2}$
$II.$ partial pressure of $CO _{2}$
$III.$ hydrogen ion concentration
$IV.$ temperature
Choose the correct option