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If $L_1\:=\{a^n \mid n\:\geq\:0\}$ and $L_2\:= \{b^n \mid n\:\geq\:0\}$ , consider $L_1.L_2$ is a regular language $L_1.L_2 = \{a^nb^n \mid n\: \geq \:0\}$ Which one of the follow…
Answer: A
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