Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
b a_d a_b b_d_a c b_a d d_c b
1
d c d a b d
2
b c a c b a
3
c a d d b a
4
d c a d b a
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
b a_d a_b b_d_a c b_a d d_c b