This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Radiology
Which is not component of left isomerism? 
Select and explain. 
A. Polysplenia, B. Midline liver, C. Left sided IVC, D. Duplication of gallbladder
D: Duplication of gallbladder
Answer: D: Duplication of gallbladder 
Explanation: Ans DDuplication of gall bladder, right sided liver, asplenia are part of right isomerism.Left isomerism :(polysplenia syndrome)# Multiple splenules without a parent spleen# Azygos or hemiazygos continuation of the inferior vena cava# Bilateral hyparterial bronchi# Bilateral bilobed lungs# Bilateral pulmonary/left atria# Midline/transverse liver# Intestinal malrotationRight isomerism (asplenia syndrome)# Severe cyanotic congenital heart diseases# Absence of spleen# Bilateral eparterial bronchi# Bilateral trilobed lungs# Bilateral right atria# Midline/transverse liver# Intestinal malrotation