Concept:A holding company is a company that owns enough shares in another company to control it.Explanation:The other company is called a subsidiary.To be a holding company, it must hold more than half of the subsidiary’s voting shares.More than half means above 50%.In the options given, the least percentage that gives majority control is 51%.Therefore, a holding company is one that holds shares in another company up to 51%.Answer:A. 51%