In a newborn child, abduction and internal rotation produces a click sound. It is -

Barlow's test Part 1 → Click sound (clunck) of dislocation on adduction. Part 2 → Click sound (clunck) of reduction on abduction. Ortolanis test Click sound (clunk) of reduction on abduction. Note : If both Barlow's test and ortolani's test are given as options in the same question, go ahead with ortolani's test as some clinicians do not consider part 2 as Barlow's test.