Assertion (A) : West-flowing rivers of Peninsular India have no deltas. Reason (R) : These rivers do not carry any alluvial sediments.

Assertion (A) is true: West-flowing peninsular rivers like the Narmada and Tapi do not form deltas. They typically form estuaries.

Reason (R) is true: These rivers flow through hard rock terrain (rift valleys) and have a short, steep course. Because they do not pass through broad alluvial plains, they lack the alluvial sediment load required to build a delta. Their high velocity and the Arabian Sea's strong tidal action further prevent sediment deposition at the mouth.

Therefore, both statements are individually true, and the lack of sediment supply (R) correctly explains why these rivers cannot form deltas (A).