<prompt> Leiden thrombophilia is caused by mutational deficiency of which of the following factors?FactorVFactorVIIFactor IXFactorX  <response>: Ref. Robbins Pathology. 9th edition. Page. 135Factor V Leiden thrombophilia is an inherited disorder of blood clotting. Factor V Leiden is the name of a specific mutation genetic alteration that results in thrombophilia, or an increased tendency to form abnormal blood clots in blood vessels. Factor V Leiden is the most common inherited form of thrombophilia. 