The Deccan Plateau is mostly composed of:

Correct option is D

The correct answer is (d) granite and basalt.
• Rock type: Igneous
• Dominant formation: Basalt (Deccan Traps)
• Presence of ancient crystalline granite
• Formed by volcanic activity
Information Booster:
• Deccan Traps formed in Cretaceous period
• Basalt weathers into black soil
• Plateau slopes eastward
• Covers large parts of peninsular India
Additional Information:
• Alluvial soil found in Northern Plains
• Limestone common in sedimentary regions
• Deccan Plateau is geologically old