A. Annelida and Arthropoda
A.
B. Platyhelminthes and Nematoda
B.
C. Cnidaria and Porifera
C.
D. Mollusca and Echinodermata
D.
Correct Answer: A
সঠিক উত্তর: A
Explanation
ব্যাখ্যা
Metameric segmentation refers to the repetition of body parts along the longitudinal axis, where similar segments are arranged serially. This is a prominent feature in Annelida (true segmentation) and Arthropoda (segmentation often fused or specialized).