Which one of the following kinds of animals are triploblastic?

Which one of the follolwing Kinds of animals are triploblastic?

in which of the following kinds of animals are triploblastic

Which of the following set of animals are triploblastic, true coelomates with open type circulatory system ?

Which of the following set of animals are triploblastic, true coelomates with open type circulatory system ?

Which one of the following animals are triploblastic?

Which one of the following pairs of animals is correctly mathced with the kind of their body symmetry.

Which one of the following groups of animals is bilaterally symmetrical and triploblastic ?

Which one of the following groups of animals is bilaterally symmetrical and triploblastic?