The Rowlatt Act, also known as the Anarchical and Revolutionary Crimes Act of 1919, is the correct answer because it incited widespread anger within the Indian population, culminating in the tragic Jallianwala Bagh Massacre.

Option 1, The Arms Act, did generate resentment but it was not directly responsible for the Jallianwala Bagh Massacre. This act curtailed Indians` right to bear arms.

Option 2, The Public Safety Act, again while controversial, did not directly lead to the massacre. This act gave the government powers to arrest and detain individuals to ensure public safety.

Option 4, The Vernacular Press Act targeted the Indian-language press, aiming to control the content they published. While it stirred protest, it was not directly linked to the Jallianwala Bagh incident.

In contrast, The Rowlatt Act, enacted without jury trial and dubbed the `black act`, intensely angered Indians. Protests against it escalated into the violence that triggered the Jallianwala Bagh Massacre.