Concept:Sex ratio is the number of females per 1,000 males in a population. Haryana has the lowest sex ratio among Indian states due to historical and socio-cultural factors like female foeticide and gender discrimination.Explanation:According to the 2011 Census, India's average sex ratio is 940. Haryana's sex ratio is significantly below this, often below 900. Other states listed — Uttar Pradesh, Arunachal Pradesh, and Punjab — all have higher sex ratios than Haryana. The low sex ratio in Haryana is a key indicator of gender imbalance. Government initiatives like Beti Bachao, Beti Padhao aim to address this issue.Answer:Haryana (Option C)