Solution:The correct chronological order of the following events is as follows:(1) Simon Commission came to India in 1928 to study the constitutional reform in Britain's most important colonial dependency.
(2) Dandi March in 1930, also known as Salt March, to produce salt in the coastal village of Dandi to break British law which introduced taxation on salt production.
(3) Gandhi-Irwin pact was a political agreement signed by Mahatma Gandhi and then Viceroy, Lord Irwin on 5 March 1931 before Second Round Table Conference.
(4) Poona Pact refers to an agreement between B.R. Ambedkar and Mahatma Gandhi signed on 24 September, 1932 for giving separate electorates to Dalit. It was signed by Pt. Madan Mohan Malviya representing Mahatma Gandhi and Dr. B.R. Ambedkar.