Where was the session of the Congress held in September 1920 in which Mahatma Gandhi convinced other leaders about starting the Non-Cooperation Movement?

In which city was the conference of Khilafat Committee in 1920 held that requested Gandhiji to assume the leadership of Non-cooperation Movement?

After which incident the Non-Cooperation movement was withdrawn by Mahatma Gandhi?

Which leader died on the day the Non-cooperation movement was launched in 1920?

The title given by the British Government to Mahatma Gandhi which he surrendered during the Non-Cooperation Movement was:

Which one of the following was not a cause for starting the Non-Cooperation Movement?