Is it wise to refer to the solution of a LRDI after trying the set and not being able to solve it? Will that help me to develop the thinking process of approaching the sets?

Hi Meghaneel Dey,
Yes, of course, you have to check the solution after trying the set and being unable to solve it. After checking the solution, try to analyse till which point you have solved the question, which clue you have missed while solving the question, etc., Also, solve similar questions in our study room so that you will become more comfortable with such questions.
Hope this helps!