This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cells of epidermis, Subject name: Dental
Which of the following statements is false about anatomy of skin? 
Select and explain. 
A. Dermal collagen 1 and 3 are in a ratio of 8:1 in dermis, B. Skin weighs about 15 % of body weight, C. Epidermis is derived from ectoderm and dermis from mesoderm, D. 90% of cells in the epidermis are keratinocytes
A: Dermal collagen 1 and 3 are in a ratio of 8:1 in dermis
Answer: A: Dermal collagen 1 and 3 are in a ratio of 8:1 in dermis 
Explanation: Anatomy of skin - * Skin - largest organ of body* Weighs around 15-16%TBW* Epidermis derived from Ectoderm* Dermis derived from Mesoderm Cells in epidermis Derived from Keratinocytes [?]85-90% Ectoderm Melanocytes Neural crest Langerhans cells Bone marrow(mesoderm) Merkel cell Ectoderm>Neural crest Most abundant fibers in dermis are collagen fibers Most commonly seen are collagen type 1 & 3. Type 1- most abundant Dermal collagen type 1: type 3 = 4:1