Consider the following statements: 1. A bill amending the Constitution requires a prior recommendation of the President of India. 2. When a Constitution Amendment Bill is presented to the President of India, it is obligatory for the President of India to give his/her assent. 3. A Constitution Amendment Bill must be passed by both the Lok Sabha and the Rajya Sabha by a special majority and there is no provision for joint sitting. Which of the statements given above are correct?