Explanation:

Pair 1 is incorrectly matched. In Bihar (not Rajasthan), the revolt was led by Kunwar Singh, the zamindar of Jagdishpur.
Pair 2 is incorrectly matched. Khan Bahadur formed his own government in Bareilly in the 1857 Indian revolt against the British rule. During the Indian Rebellion of 1857, Bareilly, too, was captured by the British.
Pair 3 is correctly matched. In June 1857, Nana Saheb and the sepoys he led attacked the British entrenchment at Kanpur and captured it.
Pair 4 is correctly matched. Maulvi Ahmadullah Shah or Maulavi of Faizabad, was one of the leading figures of the great Indian revolt of 1857. In the Awadh region, Maulavi Ahmadullah Shah was known as the ‘Lighthouse of Rebellion’. During the freedom struggle, Maulavi made Faizabad the centre and launched revolts in all of the Awadh region.