The Formosa Strait recently seen in the news connects which two seas ........

Geography Map Work

The Formosa Strait, recently seen in the news, connects which two seas:

Sea of Japan and Yellow Sea

Sea of Okhotsk and Sea of Japan

Black Sea and Sea of Marmara

South China Sea and East China Sea

Recently, a Japanese warship cruised for the first time to assert its freedom of navigation through the Taiwan Strait.

Taiwan Strait (also called the Formosa Strait) is a narrow body of water that separates the island of Taiwan from the southeastern coast of mainland China. The strait is an arm of the Pacific Ocean. It links the South China Sea, to the southwest, with the East China Sea, to the northeast.
Ports: The chief ports are Amoy in mainland China and Kao-hsiung in Taiwan.
Rivers: Several rivers including the Jiulong and Min rivers from China’s Fujian Province drain into the Taiwan Strait.
The biggest islands along the Taiwan side include Penghu (or Pescadores), Xiamen, and Pingtan.
The Taiwan Strait constitutes a critical corridor connecting the South China Sea to the East China Sea and also serves as a busy navigational waterway, on which millions of tons of cargo are ferried annually.

Hence option 4th is correct.