<prompt> Floor of body of lateral ventricle is formed bySeptum pellucidumRostrum of corpus callosumThalamostriate veinGenu of corpus callosum  <response>: Floor of body of lateral ventricle is formed by Caudate nucleusThalamostriate veinThalamus upper surface Body of fornix upper surfaceRostrum of corpus callosum forms floor, septum pellucidum forms medial wall, and genu of corpus callosum forms anterior wall of anterior horn of lateral ventricle. 