Better is to worst as slower is to which of the following degrees of speed.

Introduction / Context:
This analogy question combines ideas of comparative and superlative degrees with opposite meanings. The pair Better : worst places a comparative form of one quality alongside a superlative that represents the extreme of the opposite quality. We must select the option that gives a similar contrast in the context of speed when paired with slower.

Given Data / Assumptions:

• First pair: Better : worst.
• Better is the comparative form of good.
• Worst is the superlative form of bad and represents an extreme negative quality.
• Second pair: Slower : ?
• Options: quickest, good, best, fast.

Concept / Approach:
In the first pair, the words are not just degrees of the same adjective. Better is one step above good, but worst belongs to the opposite scale of bad and is its extreme. So the relationship can be understood as “comparative degree in one direction is contrasted with extreme degree in the opposite direction.” To mirror this for speed, we consider slower as a comparative degree meaning less fast. The opposite direction is more fast, and the extreme in that direction is quickest. Thus, slower represents a relatively low degree of speed and quickest represents the highest possible degree on the opposite side.

Step-by-Step Solution:
Step 1: Analyse Better : worst. Better corresponds to good, while worst corresponds to bad, an opposite quality. Step 2: Note that worst is the superlative of bad, representing maximum negative quality. Step 3: For speed, slower is a comparative form of slow, indicating reduced speed. Step 4: The opposite of slow is fast or quick, and the extreme positive degree is quickest. Step 5: Therefore, slower, on one side of the scale, contrasts with quickest, on the extreme opposite side, mirroring the pattern.

Verification / Alternative check:
Compare the pairs with simple scales. On the quality scale we move from bad to worst on the negative side and from good to better and then to best on the positive side. The first pair mixes sides by putting better on the positive side and worst on the extreme negative side. For speed, the scale runs from slow to slower on one side and fast to faster to fastest or quickest on the other. Matching slower with quickest reproduces that cross extreme effect. Choosing best would shift the analogy away from speed, and pairing slower with fast does not show the idea of contrast between comparative and extreme degrees.

Why Other Options Are Wrong:

• Good: This is the positive base form of the quality, not a speed term, and does not match slower in the same dimension.
• Best: Superlative of good, again about quality, not speed.
• Fast: Opposite of slow, but not the extreme form; it is only the base degree.

Common Pitfalls:
Many candidates may find this question confusing because the first pair itself seems irregular. The trick is to see the pattern of crossing from a comparative form of one quality to the highest degree of an opposite quality. Once that structure is recognised, it becomes easier to see that slower should be paired with the most extreme opposite in speed, namely quickest, rather than with the simple base fast.

Final Answer:
The correct completion is Slower : quickest, giving the analogy Better : worst :: Slower : quickest.