The reduced grammar equivalent to the grammar, whose production rules are given below, is:
S → AB|CA
B → BC|AB
A → a
C → a B | b

Which of the following are context free language?
A. {$$w^ix^jy^kz^l$$​ | i + k = j + l, where i, j, k, $$l\geq0$$​}
B. { $$w^ix^jy^kz^l$$​ | i = j and k = l, where i, j, k, $$l\geq0$$​}
C. { $$w^ix^jy^kz^l$$​ | i = j = k and $$k \neq l$$​, where i, j, k, $$l\geq0$$​}
D. { $$w^ix^jy^kz^l$$​ | i = j + l, where i, j, k, $$l\geq0$$​}
E. { $$w^ix^jy^kz^l$$​ | i = j = l and $$k \neq l$$​, where i, j, k, $$l\geq0$$​}
Choose the correct answer from the options given below: