A. Earthworm
A.
B. Jellyfish
B.
C. Tapeworm
C.
D. Frog
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
Diploblastic animals have two primary germ layers (ectoderm and endoderm) during embryonic development, with a non-cellular mesoglea in between. Jellyfish (Cnidaria) are classic examples of diploblastic organisms. Earthworms, tapeworms, and frogs are triploblastic.