<prompt> Which of the following is more aggressive rectal carcinomaAdenocarcinomaSecondary mucoid carcinomaSignet ring carcinomaSquamous cell carcinoma  <response>: Primary mucoid carcinoma gives rise to a rapidly growing bulky growth that metastasises very early and the prognosis of which is very poor Ref: Bailey Love;s Sho Practice of Surgery,E25,Page-1231 