Hi @BhanuPrasad - welcome to Udemy - have a look above and you will see there is an entire thread dedicated to AV Solutions. It is filled with great advice for you to solve your problem.
I am sure that there are other topics in the community that covers it extensively, however, here is what I use:
1. Badicam for screen recording ( it is a paid product, you can use OBS studio as a great free alternative)
2. Audio recording in Adobe Audition, Bandicam and OBS also record the audio fairly cleanly