A.Organs once develop and used but presently not in use
B.Organs having similar origin but similar or dissimilar in function
C.Organs having similar function but dissimilar origin
D.Organs having different origin and different function
A.Organs once develop and used but presently not in use
B.Organs having similar origin but similar or dissimilar in function
C.Organs having similar function but dissimilar origin
D.Organs having different origin and different function