Identify the mismatch

Consider the following statements about biomedical technologies
$\left(\mathrm{i}\right)$ During open heart surgery, blood is circulated in the heart-lung machine
$\left(\mathrm{ii}\right)$ Blockage in coronary arteries is removed by angiography
$\left(\mathrm{iii}\right)$ Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of body
$\left(\mathrm{iv}\right)$ $\mathrm{X}$-ray provides clear and detailed images of organs like prostate glands and lungs

Which two of the above statements are correct?

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Match the following