Which of the following statements is/are correct about Operation Polo?
1. It was a police action against the Razakars, a militant group that supported the Nizam's independence.
2. It resulted in the integration of Hyderabad into the Indian Union and the abolition of the Nizam's rule.
3. It was opposed by the United Nations, which passed a resolution calling for an immediate ceasefire and a plebiscite in Hyderaba(d)
4. It was preceded by a standstill agreement between India and Hyderabad, which maintained the status quo of their relations.
Select the correct answer using the code given below: