Repolarisation of the ventricles is represented by

What is the value of diastolic blood pressure in a healthy adult?

$ECG$ is a graphical representation of the electrical activity of the heart during

Match List $I$ with List $II$ :

List $I$	List $II$
$A$. $P$ wave	$I$. Heart muscles are electrically silent.
$B$. $QRS$ complex	$II$. Depolarisation of ventricles.
$C$. $T$ wave	$III$. Depolarisation of atria.
$D$. $T-P$ gap	$IV$. Repolarisation of ventricles.

Choose the correct answer from the options given below:

If repeated checking of blood pressure of an individual shows systolic $140$ $mm$ $Hg$ and diastolic $90$ $mm$ $Hg$ or higher,it indicates hypertension.

Normal diastolic pressure in a young man is about (in $,\text{mm Hg}$)