Which one of the following statements is not true?

Answer: (a) Ghaggar’s water is utilized in the Indira Gandhi Canal

Not true: the Indira Gandhi Canal takes water from the Harike barrage (Sutlej + Beas), not the Ghaggar.

The idea

A canal may transfer river water across a natural drainage divide. Its headworks identify the actual supply river, while the destination identifies the irrigated area. A river flowing through that destination region need not feed the canal.

Beas meets Sutlej at Harike → Barrage regulates the combined water → Water enters the canal system → Canal carries it towards Rajasthan → Branches distribute irrigation water → Supply reaches fields in the dry Thar region

Why the others are wrong

(b) True — the Narmada rises at Amarkantak.

(c) True — Nizam Sagar is on the Manjira.

(d) True — the Penganga reaches the Godavari via the Wardha and Pranahita.

The trap

The Ghaggar does flow into Rajasthan — but it dies in the desert.

Elimination technique

Fix the canal intake at Harike on the Beas–Sutlej system. That contradicts the Ghaggar claim in (a); the question asks for the untrue statement.

Also know

Pong stores Beas water and Bhakra stores Sutlej water. Nizam Sagar is on the Manjira in the Godavari basin. Penganga joins Wardha, which meets Wainganga to form Pranahita. Ghaggar is associated with inland north-western drainage rather than the Harike canal intake.