AP EAMCET Medical 2016 Paper

Study the following statements with reference to nervous system in Periplanata
(I) The brain is mainly a sensory and an endocrine centre
(II) All thoracic ganglia supply nerves to the parts of their respective segments only
(III) Sixth abdominal ganglionis the largest of all the abdominal ganglia
(IV) Frontal ganglion is connected to the ingluvial ganglion by a recurrent nerve