The correct answer is B. Warangal.
An inselberg is a hill or mountain that rises abruptly from a plain or plateau. They are typically found in arid or semi-arid regions, and are thought to form when resistant rock is left standing after the surrounding softer rock has been eroded away.
The Warangal inselberg is located in the Warangal district of Telangana, India. It is a popular tourist destination, and is known for its scenic beauty and its historical significance. The inselberg is home to a number of temples and other historical monuments.
The other options are incorrect because they are not located near the Warangal inselberg. Siddipet is located in the Siddipet district of Telangana, Nalgonda is located in the Nalgonda district of Telangana, and Nizamabad is located in the Nizamabad district of Telangana.