Statement 1 is wrong as the Strait of Hormuz is between the Gulf of Oman in the south-east and the Persian Gulf.
Statement 2 is wrong as on the north coast is Iran and on the south coast is the United and Musandam, an enclave of Oman.
Statement 3 is correct. In military strategy, a choke point is a geographical feature on land such as a valley, defile or a bridge, or at sea such as a strait which an armed force is forced to pass, sometimes on a substantially narrower front, and therefore greatly decreasing its combat power, in order to reach its objective. Strait of Hormuz is one such choke point.
Hence, option '3' is correct.