The given figures (A & B) shows the germinal layer. The animals having structures shown in the figures are respectively called 

Correct Answer : A.

Diploblastic animals have two germinal layers, outer ectoderm and inner endoderm, e.g., porifera and coelenterate. Triploblastic animals have three germinal layers – outer ectoderm, middle mesoderm and inner endoderm, e.g., platyhelminthes, aschelminthes, annelida, arthropoda, molluscs, echinodermata and chordata.