Which one of the following is not a deuterostome?

Which of the following organisms does not show any body segmentation?

Which of the following characteristics belongs to the Kingdom Animalia?

The only incorrectly matched pair is:

Phylum	Level of organisation

Annelida and Mollusca resemble in many embryonic features because both have

Match the following columns and select the correct option.
Column $-I$ | Column $-II$
$(a)$ $6-15$ pairs of gill slits | $(i)$ Trygon
$(b)$ Heterocercal caudal fin | $(ii)$ Cyclostomes
$(c)$ Air Bladder | $(iii)$ Chondrichthyes
$(d)$ Poison sting | $(iv)$ Osteichthyes