The Deccan Plateau is one of India's most significant geographical features.
It's a large triangular tableland that makes up most of the southern part of India.
It is indeed a triangular landmass that lies south of the Narmada River, which forms a natural boundary between North and South India.
The Satpura Range does form its northern boundary, along with the Narmada River.
The statement about slopes is incorrect. The Deccan Plateau is actually higher in the west and slopes eastward (not westward as stated in option 2). The Western Ghats form its western edge with steep slopes, while it gently slopes toward the Eastern Ghats and the Bay of Bengal.
The plateau covers several states including Maharashtra, Karnataka, Telangana, Andhra Pradesh, and parts of Tamil Nadu.
It's formed primarily of basaltic bedrock resulting from ancient volcanic activity, creating what's known as the Deccan Traps. The plateau has several important rivers flowing across it, including the Godavari, Krishna, and Cauvery, which drain eastward into the Bay of Bengal.
