The combustion of waste in the absence of Oxygen is called

The correct answer is B. Pyrolysis.

Pyrolysis is the thermal decomposition of organic matter in the absence of oxygen. It is a high-temperature process that can be used to convert waste materials into useful products, such as fuel, biochar, and syngas.

Haemolysis is the breakdown of red blood cells. It can be caused by a number of factors, including infection, injury, and certain medications.

Hydrolysis is the chemical reaction of water with another substance. It is a common process in nature, and it is used in a number of industrial processes.

None of the other options is correct.