The overall sex ratio in a country refers to the number of females per 1000 males in the population. According to the 2011 Census data, the correct answer is option 2, which states that the overall sex ratio in the country is 940. This means that for every 1000 males, there are approximately 940 females in the population. The sex ratio is an important demographic indicator that is used to assess gender imbalances in a population. A sex ratio of less than 1000 indicates a higher proportion of males, while a ratio higher than 1000 suggests a higher proportion of females. It is worth noting that the sex ratio can vary across different regions and age groups within a country.