Which of the following combinations of ‘Ruler – Predecessor’ is correct with respect to the Delhi Sultanate?

Correct option is A

Alauddin Khalji was the successor, son-in-law and killer of Jalaluddin Khalji. Jalaluddin Khalji was the founder of the Khalji dynasty. He was succeeded by his nephew and son-in-law Alauddin Khalji, who overthrew and assassinated him in 1296.
 Muhammad Tughlaq was the successor of Ghiyasuddin Tughlaq, his father, and the 2nd ruler of the Tughlaq dynasty.
 Firoz Shah Tughlaq was the successor of Muhammad Tughlaq and the third ruler of the Tughlaq dynasty.