Who was the Viceroy of India at the time of Gandhiji's Dandi march ?

Who of the following was the first Viceroy of India?

Who was the viceroy of India when Quit India movement started?

Who among the following was the only Jewish Viceroy of India?

Who among these had the longest tenure as the Viceroy of India?

Who was viceroy of India when Jallianwala Bagh massacre happened?