Hi Nivedita,
Once your query has been answered, please mark the helpful answers first and finally the correct answer, which happened to solve your problem. Marking a correct answer will change the status of the thread to 'answered'.
If you mark the helpful and correct answers, it would be helpful for others to know which one was correct and helpful, so they can apply the same method in their situation as well.
If we don't mark correct answers , people may get confused whether it has been answered or not and possibilities are there that one more thread may get raised for the same problem .
Thanks a lot for your understanding.
Regards,
SP