The following sentence has been split into four segments. Identify the segment that contains a spelling error.
In all instances of frustrasion, / you will always find / the anger directed towards / a single person only.

The correct option containing a spelling error is: In all instances of frustrasion.

Step-by-step breakdown:

1. Analyze each segment of the sentence:

- Segment 1: "you will always find" — All words are spelled correctly.

- Segment 2: "the anger directed towards" — All words are spelled correctly.

- Segment 3: "In all instances of frustrasion" — The word "frustrasion" is misspelled.

- Segment 4: "a single person only" — All words are spelled correctly.

2. Identify and correct the spelling error:

- Incorrect spelling: frustrasion

- Correct spelling: frustration (ending with '-tion' instead of '-sion')

Therefore, the segment containing the spelling error is "In all instances of frustrasion".