Which of the following combinations of 'Ruler - Predecessor' is correct with respect to the Delhi Sultanate?

Alaudddin Khalji - Jalaluddin Khalji

The correct answer is Option 1- Alaudddin Khalji - Jalaluddin Khalji

As per the question, the sequence is "Ruler-Predecessor", therefore the correct pair is "Alaudddin Khalji - Jalaluddin Khalji"

Alauddin Khilji ruled before Jalaluddin Khilji, i.e. from 1296-1316.
Jalaluddin Khilji ruled from 1290-96.

All other options are in a sequence which follow a pattern of successive rulers.

Ghiyasuddin Tughlaq ruled from 1320 to 1325.
Mohammad Bin Tughlaq ruled from 1325 to 1351.
Firoz Shah Tughlaq ruled from 1351 to 1388.