According to the World Health Organization (WHO), if the weight of a newborn at the time of birth is .......... or less, it is termed as low birth weight, even if the baby is full-term.

Correct option is A

Sol. As per WHO guidelines, a baby weighing less than or equal to 2.5 kg at birth is classified as having low birth weight. This includes full-term as well as preterm infants and often indicates risk of developmental issues and complications.
Explanation of each option: • (a) 2.5 kg – Correct. Any baby born weighing 2.5 kg or less, regardless of gestational age, is considered to have low birth weight. • (b) 3 kg – This is a normal average birth weight and does not fall under the low birth weight category. • (c) 6 kg – This is extremely high for a newborn and may indicate abnormal growth or error in understanding. • (d) 4 kg – This is higher than the average newborn weight and would be considered macrosomia, not low birth weight.