<prompt> Menadione is analog of:Vitamin KVitamin AVitamin DVitamin C  <response>: Ans. a Vitamin KRef: Harpers Biochemistry 30th edn. 1554 Menadione is the water soluble form of vitamin K.Forms of VITAMIN K Vitamin K1Vitamin K2Vitamin K3AkaPhylloquinoneMenaqui- noneMenadioneSourceSeveral green vegetables and prepared syntheticallySynthesized by Gl bacteria, supplies 50 human requirementSynthetic, Analog of 1,4-naphtho- quinineSolubilityFat solubleFat solubleDiphosphate salt is Water soluble Vitamin K Is the Coenzyme for Carboxylation of Glutamate in Postsynthetic Modification of Calcium Binding Proteins. Vitamin K Is Also Important in Synthesis of Bone Calcium Binding Proteins. Dicumarol is an anticoagulant that functions as a vitamin K antagonist. 