Detailed Solution:
The correct answer is “Daimler”.
While there were earlier attempts at creating internal combustion engines, Nikolaus Otto is generally credited with building the first practical gas engine. However, Gottlieb Daimler and Wilhelm Maybach (both associated with Otto) made significant improvements to the engine, including the development of the high-speed four-stroke engine and the carburetor. These advancements led to the gasoline engine, which is a type of gas engine.
So, while Otto is often mentioned in the context of early gas engines, Daimler's contributions were crucial to the development of the modern internal combustion engine.