The correct answer is: a) Violent acts against British officials.
Punjabi revolutionaries like Bhagat Singh and Udham Singh resorted to violent acts against British officials in order to achieve independence for India. They believed that the only way to get the British to leave India was to use force. They carried out a number of attacks on British targets, including the assassination of a British police officer. Their actions were controversial, but they are considered to be heroes by many Indians.
Option b) is incorrect because peaceful protests were not effective in achieving independence for India. The British were not willing to give up their control of India without a fight.
Option c) is incorrect because negotiations with the British were also not effective in achieving independence for India. The British were not willing to give up their control of India without a fight.
Option d) is incorrect because collaboration with the Muslim League was not a goal of Punjabi revolutionaries like Bhagat Singh and Udham Singh. The Muslim League was a political party that represented the interests of Muslims in India. Punjabi revolutionaries like Bhagat Singh and Udham Singh were secularists who believed that all Indians should be united in their fight for independence.