Leadership is the ability to secure desirable actions from a group of followers voluntarily without ...........

Explanation:

Correct Answer is (a). A leader should be able to secure desirable actions from his followers 'voluntarily' without the use of force or 'coercion' or cajolery. Both force or coercion and/or flattery or cajolery can be used to make an unwrilling person do the work. Hence logically A and F can fit into the blank.