The correct answer is option 4. This statement is not correct as it claims that in Asia, there is a high sex ratio. However, the sex ratio in Asia varies from country to country and even within regions of the same country. Some countries in Asia do have a high sex ratio, while others have a balanced or even a low sex ratio.

Option 1 is correct as in some countries, the sex ratio is expressed as the number of males per thousand females. This is a common way to represent the sex composition in a population.

Option 2 is also correct. In India, the sex ratio is expressed as the number of females per thousand males. This is done because historically, there has been a preference for male children in India, leading to a lower number of females in the population.

Option 3 is correct as well. At the world level, the sex ratio is approximately 102 males per 100 females. This means that globally, there are slightly more males than females in the population.

Therefore, option 4 is the incorrect statement as the sex ratio in Asia cannot be generalized as high.