With reference to the river Luni, which one of the following statements is correct?

Answer: (d) It is lost in the marshy land of the Rann of Kuchchh

The Luni (Rajasthan) ends in the marshes of the Rann of Kutch.

The idea

An inland drainage river ends within land instead of reaching the open sea through a permanent channel. In a dry region, evaporation, seepage and weak lower-course flow can exhaust the river. A westward course therefore does not guarantee an Arabian Sea mouth.

Runoff begins near the Aravalli upland → Luni flows south-west → Water is lost by evaporation and seepage → Lower-course water becomes more saline → Flow spreads into Rann marshes → No permanent open-sea mouth develops

Why the others are wrong

(b) It doesn’t reach the Gulf of Kutch as open water.

Also know

Ghaggar is another river associated with inland drainage in the north-west. Sambhar is a closed-basin lake, not the Luni’s mouth. Mahi and Sabarmati reach the Gulf of Khambhat, so they should be separated from rivers lost in desert or marsh settings.