Hi Shekhar,
                    Assuming that you are taking about JEE MAINS, so that at this score you can't expect anything better. According to your score, you will get around 4lac rank in Mains. So that's why I told of getting less opportunities.
So I think go with the other exam if you had.
Good luck

Hi
You belong to general category and have 43 marks in JEE mains I assume
So your rank would be below 300000 so for IITs and NITs you'll not be able to pursue your b. Tech
But it's not the end you can prepare once again for next year or can pursue your engineering from any private colleges that is approved by AICTE