The correct answer is (a) Trail.
Trail was the first British Commissioner of Kumaon. He was appointed in 1815 after the British victory in the Anglo-Nepalese War. He was responsible for administering the Kumaon region and for developing its infrastructure. He also played a role in the exploration of the Himalayas.
E. Gardner was the second British Commissioner of Kumaon. He was appointed in 1823 and served until 1830. He was responsible for continuing the development of the Kumaon region. He also played a role in the suppression of the Gurkha rebellion in 1824.
Lashington was the third British Commissioner of Kumaon. He was appointed in 1830 and served until 1833. He was responsible for continuing the development of the Kumaon region. He also played a role in the suppression of the Gurkha rebellion in 1834.
Batton was the fourth British Commissioner of Kumaon. He was appointed in 1833 and served until 1836. He was responsible for continuing the development of the Kumaon region. He also played a role in the suppression of the Gurkha rebellion in 1837.