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GATE | GATE-CS-2015 (Set 2) | Question 61

Which of the following languages is/are regular?
L1: {wxwR ⎪ w, x ∈ {a, b}* and ⎪w⎪, ⎪x⎪ >0} wR is the reverse of string w
L2: {anbm ⎪m ≠ n and m, n≥0
L3: {apbqcr ⎪ p, q, r ≥ 0}  

(A)

L1 and L3 only

(B)

L2 only

(C)

L2 and L3 only

(D)

L3 only

Answer

Please comment below if you find anything wrong in the above post
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