The following questions are based on letter series in which some letters are missing. The missing letters are given in a proper sequence as one of the alternatives among the given four alternatives under each question bca -b- aabc - a - caa

Options

A. acab
B. bcbb
C. cbab
D. c cab

Explanation

To solve the problem of finding the missing letters in the series "bca -b- aabc - a - caa", we need to analyze the pattern in the given sequence.

### Step-by-Step Solution:

1. **Identify the Structure of the Series**:
The series is composed of groups of letters. We can see that the letters are grouped in a certain way. The complete series has 16 letters, and if we divide them into 4 parts, each part will consist of 4 letters.

2. **Break Down the Given Series**:
The series can be broken down as follows:
- First part: bca
- Second part: -b-
- Third part: aabc
- Fourth part: - a -
- Fifth part: caa

3. **Look for Patterns**:
Observing the first part "bca", we notice that:
- After "b", we have "c".
- After "c", we have "a".
- The sequence appears to repeat.

4. **Determine the Missing Letters**:
Based on the observed pattern, we can fill in the missing letters:
- After "bca", the next letter should be "a" (as it follows the sequence).
- The next part should continue with "b" (as "b" follows "a").
- Continuing this pattern, we can fill in the missing letters.

5. **Construct the Complete Sequence**:
Following the established pattern:
- The complete sequence should look like: bca b a aabc a b caa

6. **Final Verification**:
- We can verify that the sequence follows the pattern of "b, c, a, a" repeatedly.
- The missing letters are filled in correctly according to the established pattern.

7. **Select the Correct Option**:
Based on the filled sequence, we can choose the option that matches our findings.

### Conclusion:
The missing letters in the series are "a, b, a", and the correct option is option number 1.