Who was viceroy of India when Jallianwala Bagh massacre happened?

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

Who was viceroy when second round table conference happened?

Who was viceroy when first railway started in India?

Who of the following was the first Viceroy of India?

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