If the head of cockroach is removed, it may live for few days because [NEET 2020]

the cockroach does not have nervous system

the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body

the head holds a 1 / \({3}^{\mathrm{rd}}\) of a nervous system while the rest is situated along the dorsal part of its body

the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.