me test series

Question

Consider alphabet Σ = {a, b}, the null/empty string λ and the set of strings X₀, X₁, X₂ and X₃ generated by the corresponding non-terminals of a regular grammar X₀, X₁, X₂, and X₃ are related as follows:

Which one of the following choice precisely represents the string in X₁ ∪ X₂?

A     b*a b*a b*a b*

B     (a + b)*

C   b* a (a + b)*

D    b*a b* a b*

answer given is c but how becz c is representing x0........please check

Comments

you forget to add the image... please add it