Ashish,
for information on the suppression of vulnerabilities.
If you load the HTML report in a webbrowser there are buttons rendered next to a vulnerability that give the suppression snippet for a false-positive (or a vulnerability mitigated by compensating controls) on a properly matched product and another suppress button next to a cpe to suppress a false-postive scenario because a library was linked to the wrong software product.
When you want to suppress temporarily because you cannot upgrade now, and accept the risk associated with the vulnerability I would advice to use the "until" attribute on the suppression to make it expire for re-evaluation at some point in the future (example shown at the bottom of the documentation page).
kind regards,
Hans