Correct Answer & Explanation
Option C
• 'Deficient' means not having enough of a specified quality or ingredient; lacking. In the context of skill, it means lacking a necessary skill.
• 'Proficient' means skilled and experienced.
• 'Adept' means very skilled or proficient at something.
• 'Incompetent' means not having or showing the necessary skills to do something successfully.
• 'Capable' means having the ability or quality necessary for something.
• Thus, 'incompetent' is the most fitting description for someone deficient in a skill.