Janissaries were a. prisoners taken by the mughal empire. b. sunni muslim soldiers in the safavid empire. c. slave soldiers in the ottoman army. d. muslim soldiers who converted to christianity.

Best answer is C) Slave soldiers in the Ottoman army

Janissaries were an elite outfit of soldiers who served some of the most important roles in the Ottoman military, including the Sultan's personal guard. They began as Christian slaves who were captured and given the choice to convert to Islam, although they were unusual slaves in that they were paid a salary and were generally respected within the Ottoman Empire.