Q.

In frog, the Renal portal system is a special venous connection that acts to link :            [2025]

1 Liver and intestine  
2 Liver and kidney  
3 Kidney and intestine  
4 Kidney and lower part of body  

Ans.

(4)

In frogs, special venous connection between liver and intestine as well as the kidney and lower parts of the body are present in frogs. The former is called hepatic portal system and the latter is called renal portal system.