A Point Charge Q = -500 NC and Two Unknown

Multiple Choice

A point charge Q = -500 nC and two unknown point charges,q₁ and q₂,are placed as shown in the figure.The electric field at the origin O,due to charges Q,q₁ and q₂,is equal to zero.The charge q₁ is closest to

A) 130 nC.
B) 76 nC.
C) 150 nC.
D) -76 nC.
E) -130 nC.