Question

Renal portal system is absent in

• A. Oryctolagus and Lepus
  
• B. Pavo and Columba
  
• C. Pteropus and Rattus
  
• D. All of the above

Answer 1

The correct option is D All of the above

Renal portal system is an arterial portal system, in which efferent glomerular arterioles receive blood from the capillaries of the renal glomeruli and carry it to the peritubular capillary plexus surrounding the proximal and distal convoluted tubules.
All reptiles possess renal portal system.
Oryctolagus and Lepus are rabbit, being a mammal, does not possess this portal system. Pavo is peacock, Columba is pigeon (birds).
Pteropus is bat while Rattus are rodents, being mammal none of them possess renal portal system.
Therefore, the correct answer is option D.