Computer Sciences > GATE 2015 SET-2 > Regular Languages
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

Correct : d

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