•  Statement 1 is incorrect. Chandraketugarh, located in West Bengal, not Odisha, was an ancient port city known for its extensive trade networks.

•  Statement 2 is correct. Inamgaon is a well-known archaeological site in Maharashtra, providing valuable insights into the Chalcolithic period.

•  Statement 3 is correct. Kerala has numerous megalithic sites, The megalithic monuments at Mangadu consisted of 28 hard compact and unhewn laterite blocks within an area of 5 cents of land.

• Statement 4 is incorrect. Salihundam, is a village and panchayat in Gara Mandal of Srikakulam district in Andhra Pradesh. It is a historically important Buddhist monument of ancient Kalinga, not rock-cut caves.

Therefore, the correctly matched rows are 2 and 3.