A mixture of igniting vs. the ignition of a mixture

[Jupiter]

Hi Teachers,

Please look at this sentence:

Jet propulsion involves…of air and fuel, which forms a powerful exhaust.

[color=blue]A/ a mixture of igniting
B/ the ignition of a mixture

Which one is the correct?

Thanks beforehand!

Jupiter

[Yankee]

@jupiter

Jet propulsion involves [color=blue]the ignition of a mixture of air and fuel, which forms a powerful exhaust.

[color=blue]A/ a mixture of igniting
B/ the ignition of a mixture

Which one is the correct? [color=blue]B

Thanks beforehand! [color=blue]Say: “Thanks in advance.”