This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
Which of the following is not a ceruloderma? 
Select and explain. 
A. Cockade nevus, B. Nevus of Ota, C. Nevus of Ito, D. Mongolian spot
A: Cockade nevus
Answer: A: Cockade nevus 
Explanation: Ceruloderma refers to dermal melanocytic lesions with blue colour. These include mongolian spot, N. of Ota & Ito, blue nevus. NB: Mongolian spot- lumbosacral region is the common site. Nevus of Ota- 1st & 2nd division of trigeminal nerve Nevus of Ito- acromioclavicular region & deltoid. Cockade nevus is an acquired melanocytic nevus refering to multiple, target-like naevi showing concentric circles of increased melanin pigmentation. Ref: Rook's textbook of dermatology, Edition-8, Page-54.20.