Dear Sir / Ma'm, it is never easy to score that high a mark in an entrance examination like NEET. However, with sheer hardwork and perseverance, you can definitely. Your aim should be to answer the maximum number of correct questions and not answer all questions. You have to keep your score such that you easily qualify the minimum cut-off of most of the colleges. Keep studying sincerely and make your concepts clear while devoting time to solving questions in a stipulated amount of time. Your hardwork will bear fruits definitely.