
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the following four conditions:
1. $b > 0 > a$
2. $0 > a > b$
3. $a > 0 > b$
4. $a > b > 0$

Determine which of them can lead to the conclusion $\dfrac{1}{a} < \dfrac{1}{b}$.

Present the answer in LaTex format: \boxed{Your answer}
user