Under Article 33 UNCLOS 1982, a coastal State has CONTIGUOUS ZONE rights up to:

1. Article 33 UNCLOS 1982: 'In a zone contiguous to its territorial sea, described as the contiguous zone, the coastal State may exercise the control necessary to: (a) prevent infringement of its customs, fiscal, immigration or sanitary laws and regulations within its territory or territorial sea; (b) punish infringement of the above laws and regulations committed within its territory or territorial sea. The contiguous zone may not extend beyond 24 nautical miles from the baselines from which the breadth of the territorial sea is measured.' 2. So the contiguous zone is 24 nm − 12 nm (TS) = 12 nm wide (in the sea beyond TS). 3. Hence option B is correct. _Source: UN Charter 1945 / Vienna Convention on Law of Treaties 1969 / Geneva Conventions 1949 / ICJ Statute / UDHR ICCPR ICESCR — UN Convention on the Law of the Sea 1982, Article 33_