Which of the following Mughal period canals, was constructed by restoring the Rajabwah of Firuz Shah ?

1. A

   Shekhnu-Ni

   (a) Shekhnu-Ni. This is not the Mughal restoration of Firuz Shah’s Rajabwah.

2. B

   Shahab Nahr

   (b) Shahab Nahr. The Mughals restored Firuz Shah Tughlaq’s Rajabwah (Western Yamuna Canal) as Shahab/Shah Nahr, feeding the Delhi–Yamuna doab. Official key.

3. C

   Nahr-i-Bihisht

   (c) Nahr-i-Bihisht. Nahr-i-Bihisht is Shah Jahan’s ‘canal of paradise’ around the Red Fort/Yamuna front, not the Rajabwah restoration name keyed here.

4. D

   Nahr-i-Agra

   (d) Nahr-i-Agra. Agra canal labels are a different stretch; they are not the Rajabwah revival title on this list.

Summary. Official key is (b) Shahab Nahr. Firuz Shah’s Rajabwah drew Yamuna water toward Hisar–Delhi. Mughal engineers (notably under Shah Jahan / Ali Mardan Khan’s canal works) revived that alignment as Shahab Nahr. Nahr-i-Bihisht is a courtly Shahjahanabad water channel, a frequent mix-up.