Correct option is B
The statement that is NOT true for fixed drum type biogas power plants is that it has constant pressure of biogas.
A biogas power plant converts organic matter into biogas, a fuel that can be used for electricity generation and heating.
These plants utilize anaerobic digestion, a process where bacteria break down biodegradable waste in an oxygen-free environment, producing biogas (primarily methane and carbon dioxide) and a nutrient-rich digestate.
The biogas can be used in combined heat and power (CHP) units to produce electricity and heat, or upgraded to biomethane for injection into the natural gas grid.
