Question: If the language A = { a m b n c n | m , n 0 } and the language B = { a

If the language A={ambncn|m,n0} and the language B={anbncm|m,n0} then:
AB={anbncn|n0}, is not context free.
AB={anbncn|n0}, is context free.
AB={ambmncm|m0}, is not context free.
AB={ambmcm|m0}, is context free.
If the language A={ambncn|m,n0} and the language B={anbncm|m,n0} then: AB={anbncn|n0}, is

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