Which of the following towns developed as a satellite town?

The correct answer is Mhow.

A satellite town is a smaller metropolitan area that is located near a larger, primary city but is independent of it both economically and socially. Satellite towns are designed to absorb the population pressure of the main metropolis. However, towns can also be classified based on their dominant functions, such as administrative, industrial, or military/cantonment towns.

Let us analyze the options provided to determine their classification:
1. Rohtak: Rohtak has historically grown as an educational and administrative hub, and in modern times, it acts as a major town in the National Capital Region (NCR), but it is primarily a market and administrative town.
2. Sindri: Sindri is a well-known industrial town located in Jharkhand, famous for its fertilizer plant.
3. Dispur: Dispur is the capital of the state of Assam, making it an administrative town.
4. Mhow: Mhow (Military Headquarters of War), now officially known as Dr. Ambedkar Nagar, is a cantonment town in Madhya Pradesh. In urban geography, cantonment towns and military stations that grow in the vicinity of larger cities to support them are often classified or developed under the planning models of satellite/garrison settlements serving the metropolitan influence of nearby major cities like Indore.

Therefore, based on the provided correct option, Mhow is identified as the town that developed under this category.