Microsomia" is defined as -
Ans. is 'b' i.e., Bih weight below 10' percentile Microsomia means small for date baby, i.e. newborn baby with a bih weight less than 10th percentile.
Bih weight below 90th percentile
Bih weight below 10th percentile
Bih weight below 20th percentile
Bih weight below 50th percentile