AIDS can come from mother to child, so it is a congenital disease.But it is an acquired disease by name & also mentioned in ncert.ncert says that it is not a congenital disease.please clear my confusion....

Acquired: Not inherited, or present at birth (congenital), but developing after birth. For example, AIDS is an acquired, not an inherited, form of immune deficiency. Technically speaking, a 'congenital disease' is a term used to describe some (or any) disease that you had at birth. From that point of view, AIDS could be considered congenital too. But, normally -- or most often, the words 'congenital disease' are used to explain those diseases which the mother does not have but the child has. Typically, those would not be diseases caused by any kind of germs. Mostly some deficiencies, partial development of some organs, damage to some of the organs etc., would fall into this category.