plz give the correct answer with explanation

Dear student,
Please find below the answer:

The correct option is (B).
The Portuguese man o' war is a marine cnidarian of the family Physaliidae i.e. Physalia. It is not a colonial organism made up of many highly specialized minute individuals called zooids. These zooids are attached to one another and totally dependent on one another such that they are incapable of independent survival.

Hope this clears your doubt.
Regards.