Solution

Statement A is true as Periplaneta americana (arthropod) are characterized by presence of schizoceolom which is a body cavity directly derived from splitting of mesoderm during embryonic condition. Statement D is true as arthropods are characterized by presence of segment body with repetitive organs and tissues i.e. metameric segmentation and jointed appendages adapted for various functions. Statement C is true as whole body of arthropods is covered with exoskeleton made up of chitin which in turn is a polymer of N-acetyle glucosamine. Statement B is false as protostomes (arthropods belong to Ecdysozoa of protostomes) are characterized by spiral and determinate cleavage in which the planes of cleavage are not symmetrical between poles.