A boy pulls a nail from a wall with a string tied to the nail.
The string is inclined at an angle of \(60^{\circ}\) to the wall.
If the tension in the string is \(4 N\).
what is the effective force used in pulling the nail?

A. 2 N  
B. \(2 \sqrt{3} N\)
C. 4 N
D. \(4 \sqrt{ 3} N\)
E. 8 N

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Correct Answer: A