Detailed Solution:
The correct answer is “In the lathi charge of protesting against Simon Commission”.
In October 1928, Lala Lajpat Rai was leading a protest against the Simon Commission in Lahore when he was subjected to a police baton charge (lathi charge). The injuries he sustained during this incident contributed to his death later that year.
Simon Commission was formed on 26th November 1927. It arrived in India on 3rd February 1928. Simon commission submitted its reports on 27th May 1930.