Explanation:

- Recent statistical reports and surveys often provide data on employment patterns, including the percentage of urban workers who are casual laborers.

- "Casual laborers" refers to workers without permanent employment and often without job security.

- The options provided reflect different statistics, possibly sourced from specific datasets, reports, or studies.

- Option 1: 54 percent

- This is a relatively high percentage, suggesting more than half of urban workers are casual laborers.

- Option 2: 41 percent

- This indicates just under half of urban workers are in casual employment, possibly reflecting economic conditions where casual work is prevalent.

- Option 3: 39 percent

- Similar to Option 2, this indicates a significant minority but not the majority.

- Option 4: 18 percent

- This is considerably lower than other options, suggesting that only a small portion of urban workers might be in casual labor roles.

Correct Answer: Option 4: 18 percent