Who among the following rulers of medieval Gujarat surrendered Diu to Portuguese?

1. A

   Ahmad Shah

   Ahmad Shah. Early Muzaffarid; not the Diu cession to the Portuguese.

2. B

   Mahmud Begarha

   Mahmud Begarha. Fifteenth-century Gujarat sultan; fought the Portuguese later in the story, not this surrender.

3. C

   Bahadur Shah

   Bahadur Shah. Ceded Diu to the Portuguese (1530s) amid the Gujarat–Mughal–Portuguese tangle.

4. D

   Muhammad Shah

   Muhammad Shah. A repeating throne-name, not the Diu treaty figure.

Summary. Official key is (c) Bahadur Shah of Gujarat. Pressed by Humayun, he sought Portuguese help and lost Diu to them. Ahmad Shah, Mahmud Begarha and a generic Muhammad Shah are the wrong reigns.