The correct option is A Is composed of colourless plasma and numerous types of haemocytes
Cockroaches, like other insects have an open circulatory system and their blood is also known as haemolymph. It flows freely inside the body, touching all the internal organs and tissues. About 90% of this blood is watery fluid and the remaining 10% is made up of hemocytes. Therefore the haemolymph of cockroach is composed of colourless plasma and numerous types of haemocytes.