Question: if L 1 and L 2 are regular languages, L 3 is a Context Free Language, which of the following is a regular language? Group

if L1 and L2 are regular languages, L3 is a Context Free Language, which of the following is a regular language?
Group of answer choices
L1+L2+L3
Complement of (L1+L2)
Complement of (L1+L3)
L2L3

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