An error 2%in excess is made while measuring the side of a square. What is the percentage of error in the calculated area of the square? Choose the correct choice from the following answers
A) 4.04
B) 4.02
C) 4.01
D) 4.05
E) 4.06

Rationale: "formula for calculation of percentage error is : = ( x − y − ( xy ) / 100 ) % = ( 2 + 2 + ( 2 × 2 ) / 100 ) % = 4.04 % answer is a ."
Answer: A