Which colonial-era law led to forced labor obligations and unrest among peasants and tribes in Manipur?

The correct answer is: a) Pothang System.

The Pothang System was a system of forced labor imposed on the people of Manipur by the British colonial government. Under this system, peasants and tribesmen were forced to work on government projects, such as building roads and bridges, without pay. This system led to widespread unrest and resentment among the people of Manipur.

The other options are incorrect because:

• The Manipur Land Revenue and Land Reforms Act was a law passed by the Indian government in 1960 to regulate land ownership and land revenue in Manipur. This law did not lead to forced labor obligations.
• The Inner Line Permit is a travel document required by Indian citizens to enter certain areas of northeastern India, including Manipur. This document is not related to forced labor.
• The Armed Forces (Special Powers) Act is an act of the Indian Parliament that gives special powers to the Indian Armed Forces in certain areas of India, including Manipur. This act does not authorize forced labor.