The correct set for porifera is-
1) acoelomates, fresh water, zooplanktonic, triploblastic, cell aggegrate body plan

2) eucoelomates,marine ,sedentary,diploblsatic, blind sac body plan

3) cellular level of organisation,mostly marine, sedentary,diploblsatic

4) acoelomates, marine, sedentary, diploblsatic, blind sac body plan

as my teacher told answer is 3rd option now why the 4th option is not correct