d
$(d)$ Blood pressure is gauge pressure.
Also,
Actual pressure $=$ Atmospheric pressure + Gauge pressure
$\Rightarrow$ Actual pressure $=760 mm$ of $Hg$
$+190 \,mm$ of $Hg$
$=950 \,mm$ of $Hg$
$=1.25 \times 760 \,mm$ of $Hg$
$\therefore$ Actual pressure is $1.25$ times of atmospheric pressure.