Explanation:

- Option 1: Largest

- India has historically had a significant number of illiterates.

- Large population size contributes to this statistic.

- ?? Correct Answer: Largest

- Option 2: Lowest

- This would mean having the fewest illiterates globally.

- India does not fall into this category due to its large population and literacy challenges.

- Option 3: Average

- Suggests a moderate number of illiterates relative to other countries.

- India’s literacy issues are more pronounced than average.

- Option 4: None of these

- This implies all other options are incorrect.

- Given the context, this option does not apply.