No other candidate is ______ qualified for the role as she is.

Explanation:

The sentence follows the pattern of a comparison using “so…as”.

👉 Correct structure:
No other + noun + is + so + adjective + as + subject

🔁 Correct sentence:

👉 No other candidate is so qualified for the role as she is. ✔️

❌ Why others are incorrect:

• such ❌ → used with nouns (such a person), not here

• more ❌ → used in comparative (more qualified than)

• as ❌ → incomplete without “so”

📌 Extra Tip (Exam Trick):

1. No other / Very few / Few → use “so…as”

2. Alternative form:
   👉 She is more qualified than any other candidate.

Conclusion:

👉 The correct answer is “so” ✔️