Assertion: Three equal charges are situated on a circle of radius r such that they form an equilateral triangle, then the electric field intensity at the centre is zero.
Reason: The force on unit positive charge at the centroid of an equilateral triangle due to the three equal charges at the three vertices are represented by the three sides of a triangle taken in the same order. (Therefore, electric field intensity at centre is zero.) 

Options

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
C. Assertion is true and Reason is false
D. Assertion is false and Reason is false

Answer

A