Explanation: Mount Thuiller is located in Great Nicobar and not in the Andaman Group of Islands.

The Islands

• There are two major island groups in India one in the Bay of Bengal and the other in the Arabian Sea.
• The Bay of Bengal Island groups consist of about 572 islands/islets. These are situated roughly between 6°N-14°N and 92°E -94°E.
• The two principal groups of islets include the Ritchie’s archipelago and the Labrynth island.
• The entire group of islands is divided into two broad categories – the Andaman in the north and the Nicobar in the south.
• They are separated by a water body which is called the Ten-degree channel.
• It is believed that these islands are an elevated portion of submarine mountains. However, some smaller islands are volcanic in origin.
• Barren island, the only active volcano in India is also situated in the Nicobar Islands.
• Some important mountain peaks in Andaman and Nicobar Islands are
• Saddle peak (North Andaman – 738 m),
• Mount Diavolo (Middle Andaman – 515 m),
• Mount Koyob (South Andaman – 460 m) and
• Mount Thuiller (Great Nicobar – 642 m).

Source: Class 11th NCERT