This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
Which sinus is present over falx cerebelli? 
Select and explain. 
A. Sigmoid sinus, B. Inferior petrosal sinus, C. Straight sinus, D. Occipital sinus
D: Occipital sinus
Answer: D: Occipital sinus 
Explanation: Occipital sinus is the smallest sinus, situated along the attached margin of falx cerebelli.Straight sinus runs along the line of attachment of falx cerebelli with the tentorium cerebelliInferior petrosal sinus lies in the groove between the petrous temporal bone and clivus of sphenoid.Sigmoid sinus lies between the two layers of dura of posterior cranial fossa.(Ref: Vishram Singh textbook of clinical neuroanatomy, second edition-pg189,191)