`- nmmn - mmn n - mn nm -`

Options

A. nmmn
B. mnnm
C. nnmm
D. nmnm

Explanation

To solve the series completion question `- nmmn - mmn n - mn nm -`, we need to identify the pattern in the given sequences and determine which option fits best.

### Step-by-Step Solution:

1. **Identify the Given Series**: The series provided is:
- `- nmmn - mmn n - mn nm -`

2. **Break Down the Series**: Let's analyze each segment of the series:
- The first segment is `nmmn`
- The second segment is `mmn n`
- The third segment is `mn nm`

3. **Look for Patterns**: We will look for any repeating patterns or sequences in the segments.
- The first segment `nmmn` has a structure of one 'n' followed by two 'm's and then another 'n'.
- The second segment `mmn n` has two 'm's followed by one 'n' and then another 'n'.
- The third segment `mn nm` has one 'm', one 'n', one 'n', and one 'm'.

4. **Identify the Sequence**: From the analysis, we can see that:
- The segments seem to alternate between 'n' and 'm'.
- The first segment has a pattern of 'n', 'm', 'm', 'n'.
- The second segment has 'm', 'm', 'n', 'n'.
- The third segment has 'm', 'n', 'n', 'm'.

5. **Determine the Next Segment**: Based on the observed patterns:
- The segments are alternating and seem to follow a pattern of increasing the number of 'n's and 'm's.
- The next logical segment could be `nnmm`, which follows the pattern of having two 'n's followed by two 'm's.

6. **Choose the Correct Option**: Based on the analysis, we can conclude that the next segment in the series should be `nnmm`.

### Final Answer:
The answer is `nnmm`.