What is the difference between "keiner" and "niemand" aside from that niemand doesn't specify gender.
I believe "Keiner" is more of a plural form, whereas "niemand" is singular. Ie: ,,Niemand ist frei" Which is the singular, "No one is free" und "Keiner mogen Katzen" which is the plural "nobody likes cats".
I'm not German, that's just my guess.
"Keine lernt" should be a correct answer too, shouldn't it?
i also think keine should be correct since it is the nominative case
I thought the voice pronounced it more like "Keine" too.