A. Hydra
A.
B. Starfish
B.
C. Tapeworm
C.
D. Earthworm
D.
Correct Answer: C
সঠিক উত্তর: C
Explanation
ব্যাখ্যা
Triploblastic means having three germ layers (ectoderm, mesoderm, endoderm). Bilaterally symmetrical means the body can be divided into two mirror halves. Acoelomate means lacking a true body cavity. Tapeworms (Phylum Platyhelminthes) fit all these descriptions. Hydra is diploblastic, starfish is radially symmetrical (adult), and earthworm is coelomate.