Which one of the following statements best reflects the issue with Senkaku Islands, sometimes mentioned in the news?

1. A

   It is generally believed that they are artificial islands made by a country around South China Sea.

   Artificial islands in the South China Sea. That is a Spratly/Mischief Reef story, not Senkaku.

2. B

   China and Japan engage in maritime disputes over these islands in East China Sea.

   China and Japan dispute the islands in the East China Sea. Senkaku / Diaoyu.

3. C

   A permanent American military base has been set up there to help Taiwan to increase its defence capabilities.

   A permanent US base to arm Taiwan. Not the Senkaku file.

4. D

   Through International Court of Justice declared them as no man's land, some South-East Asian countries claim them.

   ICJ no-man’s-land. The ICJ has not so held.

Summary. Official key is (b). The Senkaku (Diaoyu) Islands are an East China Sea dispute between Japan and China. They are not SCS reclamations, a US–Taiwan base, or an ICJ terra nullius.