Which of the following represents a language which has no pair of consecutive 1’s if ∑= {0,1}?(a) (0+10)*(1+ε)(b) (0+10)*(1+ε)*(c) (0+101)*(0+ε)(d) (1+010)*(1+ε)I got this question in a national level competition.My question is based upon Building Regular Expressions topic in chapter Regular Expressions and Languages of Automata Theory

Which of the following represents a language which has no pair of cons

1.	Which of the following represents a language which has no pair of consecutive 1’s if ∑= {0,1}?(a) (0+10)(1+ε)(b) (0+10)(1+ε)(c) (0+101)(0+ε)(d) (1+010)*(1+ε)I got this question in a national level competition.My question is based upon Building Regular Expressions topic in chapter Regular Expressions and Languages of Automata Theory
Answer» CORRECT choice is (a) (0+10)*(1+ε) The best I can explain: All the options except ‘a’ accept those STRINGS which comprises minimum ONE PAIR of 1’s together.

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