The correct option is "2 only" because the anti-defection law indeed allows a nominated member to join a political party within six months of their nomination, thus rendering statement 1 incorrect. Additionally, the law does not set a specific timeframe for the presiding officer to decide on a defection case, which is a crucial aspect that can lead to delays and may affect political stability. This understanding is essential for comprehending the nuances of political accountability and legislative integrity in India, which can be relevant in the context of governance and constitutional studies for UPSC exams.