Brown hydrogen

Brown hydrogen is created from

[A] Electrolysis
[B] Lignite
[C] Nuclear reaction
[D] Natural gas

ANSWER

[B] Lignite

Brown hydrogen is produced using coal gasification process.
Lignite (brown coal) is used in the hydrogen-making process
In coal gasification, coal is converted from its solid state into a gas. The gasification process breaks down coal into its chemical constituents, which includes methane gas.
Coal is exposed to oxygen and hot steam under high pressure and temperatures.
Using black coal – Black hydrogen
Using Brown coal [ Lignite ] – Brown hydrogen