Option 1: The statement "Labour is more in number than that in the organized sector" is true. The unorganized sector in India employs a larger number of people compared to the organized sector.

Option 2: The statement "Job security and work regulation are better in the unorganized sector" is not true. The unorganized sector typically lacks job security and has weaker work regulations compared to the organized sector. Workers in the unorganized sector often face precarious employment conditions.

Option 3: The statement "They are usually not organized into trade unions" is true. Workers in the unorganized sector often face challenges in organizing themselves into trade unions due to various factors such as low awareness, lack of resources, and fear of employer backlash.

Option 4: The statement "Workers are usually employed for a limited number of days" is true. In the unorganized sector, workers are often engaged in temporary or seasonal work, which leads to limited employment opportunities.

Therefore, the correct answer is option 2. Alert - correct answer should be option 1