The correct option is "2 and 3 only." A Constitution Amendment Bill does not require prior recommendation from the President of India (Statement 1 is incorrect); it can be introduced in either House of Parliament without such a recommendation. However, when a Constitution Amendment Bill is presented to the President, it is mandatory for the President to give assent (Statement 2 is correct). Additionally, these bills must be passed by a special majority in both Houses of Parliament, and there is no provision for a joint sitting, which preserves the individual authority of each House in constitutional matters (Statement 3 is correct).