STD 12 - 3. reproductive health — NEET STD 11 Science — Question

$I.$ $A$ might be before $B$ and $C$

$II.$ $B$ might be between $A$ and $C$

$III.$ $C$ might be between $A$ and $B$

$IV.$ More crosses has occurred between $A$ and $C$ than $A$ and $B$

$(a)$ Contraction of diaphragm

$(b)$ Contraction of external inter-costal muscles

$(c)$ Pulmonary volume decreases

$(d)$ Intra pulmonary pressure increases