Consider the following statements related to the geographical features of India's major mountains, plateaus, and deserts:

1. 1. 'Anaimudi', the highest peak of South India, located on the Anaimalai Hills of the Western Ghats, is actually part of a massive block mountain and has a height of about 2,695 meters.
2. 2. The Chota Nagpur Plateau is an excellent example of a 'peneplain', formed mainly by the erosion of ancient crystalline and metamorphic rocks, and the Damodar River flows through a rift valley across its center.
3. 3. The Aravalli Range is one of the oldest folded mountain systems in the world, currently found in its residual form (residual mountains), and its highest peak 'Guru Shikhar' is located in Mount Abu (Rajasthan).
4. 4. The crescent-shaped sand dunes found in the Thar Desert (Great Indian Desert) are called 'Barchans', and the 'Luni' flowing here is the only major river that disappears into the Rann of Kutch, representing an inland drainage system.

Which of the above statement(s) is/are completely true?