Vitamin A deficiency can affect upto these many children in the middle and low income areas

The correct answer is 1/3.

Vitamin A is an essential micronutrient crucial for maintaining healthy vision, promoting a strong immune system, and supporting proper growth and development in children. Since the human body cannot synthesize vitamin A, it must be obtained through a diet rich in foods like green leafy vegetables, orange-colored fruits and vegetables (such as carrots and sweet potatoes), and animal products.
In middle- and low-income countries, access to a diverse and nutrient-rich diet is often limited. As a result, vitamin A deficiency (VAD) remains a severe public health issue. Epidemiological data and global health reports, such as those from the World Health Organization (WHO), estimate that approximately one-third (1/3) of all preschool-age children in these resource-limited regions suffer from vitamin A deficiency, making them highly vulnerable to preventable blindness and infectious diseases.