Refer to the given Venn diagram and select the incorrect statement regarding P, Q and R.
A R has three pairs of jointed legs which help it to walk, run and climb.
B Q has paired and unpaired fins that help in movement in water.
C P has special air sacs connected to the lungs which aid in respiration process.
D Q is a shelled animal that possesses a muscular structure called foot which produces a series of wave like movements, pushing its body forward.
As per the question the animal Q is an shelled animal because it have endoskeletonSo the option D should be correct.