Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
_cb_a_b_a_b_ _c_da
- Aadcdcadb
- Badcdcdab
- Cadcddcab
- Dadcdcdba
Solution & Step-by-step Explanation
The complete string contains 16 positions. Let's divide the series into 4 groups of 4 letters each:
_ c b _ \mida _ b _ \mida _ b _ \mid_ c _ d a
Let's test Option B: a, d, c, d, c, d, a, b
Group 1: a c b d
Group 2: a c b d
Group 3: a c b d
Group 4: a c b d (with the remaining trailing character matching the logic)
The repeating pattern formed is clear and consistent: acbd∣acbd∣acbd∣acbd.
Therefore, the correct combination of letters is adcdcdab.
_ c b _ \mida _ b _ \mida _ b _ \mid_ c _ d a
Let's test Option B: a, d, c, d, c, d, a, b
Group 1: a c b d
Group 2: a c b d
Group 3: a c b d
Group 4: a c b d (with the remaining trailing character matching the logic)
The repeating pattern formed is clear and consistent: acbd∣acbd∣acbd∣acbd.
Therefore, the correct combination of letters is adcdcdab.