<prompt> True about head circumference measurement -Measured in supra-orbital ridgeMeasured hydrocephalusmicrocephalySerial measurement is usefulAll  <response>: Ans. is All Options a o Head circumference is measured from the occipital protuberance to the supraorbital ridge on the forehead. Option b o If the head circumference growth exceeds 1 cm in 2 weeks during the first 3 months, hydrocephalus should be suspected. o In microcephally head circumference is two standard detion below the mean for age and sex. Option c o Head circumference measurements that progressively drop to lower percentiles with increasing age are indicative of a process or condition that has impaired the brains capacity to grow. o So, serial measurement helps to assess neurological development and pediatric intelligence. 