Explanation:

Andaman and Nicobar Islands

• Andaman and Nicobar Islands were formed due to collision between Indian Plate and Burma Minor Plate.
• Andaman and Nicobar Islands are southward extension of Arakan Yoma range.
• Arakan Yoma in itself is an extension of Purvanchal Hills.
• This archipelago is composed of 265 big and small islands.
• The Andaman and Nicobar islands extend from 6° 45′ N to 13° 45′ N and from 92° 10′ E to 94° 15′ E.
• The Andaman Islands are divided into three main islands i.e. North, Middle and South.
• Duncan passage separates Little Andaman from South Andaman.
• The Great Andaman group of islands in the north is separated by the Ten Degree Channel from the Nicobar group in the south.

Port Blair, the capital of Andaman Nicobar Islands lies in the South Andaman.

• Among the Nicobar Islands, the Great Nicobar is the largest. It is the southernmost island and is very close to Sumatra island of Indonesia. The Car Nicobar is the northernmost.
• The Barren and Narcondam Islands, north of Port Blair, are volcanic islands.
• Barren Island is the only active volcano in India while Narcondam Island is a dormant volcano.
• There are no active volcanoes in main land India.
• Saddle peak (737 m) in North Andaman is the highest peak.

Hence both statements 1&2 are correct.