Which of the following letter clusters will replace the blanks in the given series? ca _ pcaa _ caa _ caap _ aap

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it? a _ c a a _ b c c _ a a b b b _ c c

Select the option that completes the letter series when placed sequentially in the blanks from left to right: m_kn_c_ h bcbm_k_bcb