Which of the following languages are context-free? L1 = {ambnanbm ⎪ m, n ≥ 1} L2 = {ambnambn ⎪ m, n ≥ 1} L3 = {ambn ⎪ m = 2n + 1}

Which of the following languages are context-free? L1 = {ambnanbm ⎪

1.	Which of the following languages are context-free? L1 = {ambnanbm ⎪ m, n ≥ 1} L2 = {ambnambn ⎪ m, n ≥ 1} L3 = {ambn ⎪ m = 2n + 1}
A.	L1 and L2 only
B.	L1 and L3 only
C.	L2 and L3 only
D.	L3 only
Answer» C. L2 and L3 only

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Which of the following languages are context-free? L1 = {ambnanbm ⎪ m, n ≥ 1} L2 = {ambnambn ⎪ m, n ≥ 1} L3 = {ambn ⎪ m = 2n + 1}

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