According to Article 51A of the Constitution which among the following are correct?<br>1. It shall be the duty of every state to protect monuments of national importance.<br>2. It shall be the duty of every citizen of India to uphold and protect the sovereignty, unity and integrity of India.<br>3. The state shall take steps to protect and improve the environment and to safeguard the forest and wild life of the country.<br>4. It shall be the duty of every citizen of India to develop the scientific temper, humanism and the spirit of inquiry and reform.<br>Choose your answer from the following options:

Correct Answer: 2 and 4 only