Concept:The sex ratio is the number of females per 1,000 males, and it reflects gender balance in a population. Among Indian states, Haryana has the lowest sex ratio.Explanation:According to the 2011 Census, the national sex ratio was 940 females per 1,000 males. Haryana has historically recorded the lowest sex ratio due to factors such as son preference and female infanticide. Other states like Uttar Pradesh, Punjab, and Arunachal Pradesh have higher ratios. Government initiatives like Beti Bachao, Beti Padhao aim to improve this indicator.Answer:Haryana (Option C)