A. Correct → In frogs, the special venous connection between liver and intestine is called the hepatic portal system. B. Incorrect → There are ten pairs of cranial nerves arising from the brain of frog. C. Correct → In female frogs, the uterus and oviduct open separately in the cloaca. D. Incorrect → In frogs, the midbrain consists of the optic lobes. The hindbrain consists of cerebellum, and medulla oblongata. E. Correct → In frogs, a triangular structure called sinus venosus joins the right atrium. Thus, correct statements are (A), (C) and (E)