Hey
mohitdel1984Welcome to GMATClub.
The first step, IMO, will be to get an ESR for this attempt. This should help
clear out a few things such as the topics which need more attention. Once
you have the ESR, you will know where to spend the maximum time. That
said, in order to improve your aptitude when it comes to the problem areas
as per you - for SC, you should re-do the Manhattan Strategy guide as far
as concepts are concerned. Once, you are well versed with the concepts,
you should start by working on questions from the following thread:
https://gmatclub.com/forum/sentence-cor ... 29750.htmlIn addition to this, you should use the SC and RC butler thread on a regular
basis. Here, you will see both quality questions and quality explanations and
this will help you iron out the understanding still further.
Hope that helps.