Central dot sign is seen in-

Ans. is 'a' i.e., Caroli's diseaseCentral Dot sign* Central dot sign refers to tiny dots with strong contrast enhancement of portal vein within dilated hepatic bile ducts on CT.* Central dot sign is seen in: -i) Caroli's disease (me. cause)ii) Obstructive jaundiceiii) Prebiliary cystiv) Periportal lymphedema