Inveogram is taken after -

Ans. is 'c' i.e., 6 hrs 24 hrs is a better option. Both 6 hrs and 24 hrs were mentioned in Bailey's 24th edition, whereas 25th edition mentions only 24 hrs. Read the lines from 24th below. 24th edition- "Six hours after bih, sufficient air may have collected in the large intestine to cast a radiographic shadow. With a metal button or a coin strapped to the site of the anus, the infant is held upside down and radiographed in the inveed position. .......................................................................... It may be necessary to wait until the baby is 24 hours old before rectal gas appears." 25th edition- "By 24 hours, the distal limit of air within the rectum, seen on a lateral prone radiograph, indicates the distance between the rectal stump and perineum"