Find the missing characters in the following series.

1._m_l_l_ml_m_
(A) ll m lll
(B)ml mll m
(C) II m Il m
(D) ml ml mm

2. a_c_b a_c a_cb
(A) abcc
(B) acba
(C) bcaa
(D) bcba

3.a__b a_b_a a_b

(A) aabab
(B) ababb
(C) bbaba
(D) abbab