After which incident the Non-Cooperation movement was withdrawn by Mahatma Gandhi?

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

Gandhiji launched the Non-Cooperation Movement in –

The Non-Cooperation Movement was started in –

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

Who was the first leader arrested in the non-cooperation movement?