For parallelism questions like this one, the fastest approach is to list only the items in the series side by side, stripped of connecting words, and compare their grammatical form directly.
The series here, once extracted, is: "to live", "to love", "to serve", and "also admiration". Lined up this way, the mismatch jumps out immediately: the first three items are all infinitive verb phrases beginning with "to", while the fourth item is a plain noun, "admiration", with no "to" and no verb form at all.
For the sentence to read smoothly and grammatically, every item feeding into "are what I aspire for" must be the same part of speech. Since the established pattern is infinitives (to live, to love, to serve), the fourth item must also be an infinitive: "to admire". Swapping "also admiration" for "to admire" restores the parallel structure: "To live, to love, to serve, and to admire are what I aspire for."
Because this noun-versus-infinitive mismatch occurs specifically within phrase (c), "also admiration are what", that phrase is the one carrying the grammatical error.
The correct answer is option 3, phrase (c).
Identify the part of the sentence that contains an error:
"Neither the manager nor the employees ___ willing to accept the new policy."