The answer should be "slow" the first pairing both end in "-est" making them superlatives giving a parallel in the structure. Following the same structure, the words from the pairing after can be ignored, the word dim is an adjective, "light" bulb is a noun, therefore, it is not a parallel structure.
Answer:
No i can not help you so do it yourself
Why do you need the answer to this? I not a right or wrong answer......
Can you provide the possible answers?