Choose the correct statements regarding frog's anatomy :
A. Hepatic portal system is the special venous connection between liver and intestine.
B. There are twelve pairs of cranial nerves arising from the brain.
C. The ureters and oviducts open separately into the cloaca in female frogs.
D. Hind-brain consists of cerebellum, medulla oblongata and optic lobes.
E. Sinus venosus joins the right atrium of heart.
Choose the correct answer from the options given below :

(D) A, C and E only
Statement A is correct. The hepatic portal system is a special venous connection between the liver and the intestine in frogs.
Statement B is incorrect. There are ten pairs of cranial nerves arising from the brain in frogs, not twelve.
Statement C is correct. In female frogs, the ureters and oviducts open separately into the cloaca, whereas in male frogs, ureters act as urinogenital ducts.
Statement D is incorrect. The hind-brain consists of the cerebellum and medulla oblongata. The optic lobes are a part of the mid-brain.
Statement E is correct. The sinus venosus is a triangular structure that joins the right atrium of the heart and receives blood through the venae cavae.
Therefore, the correct statements are A, C, and E