Given are four arrangements of three fixed electric charges. In each arrangement, a point labeled P is also identified. A test charge +q is placed at P. All of the charges are of the same magnitude Q, but they can be either positive or negative as indicated. The charges and point P all lie on a straight line. The distances between adjacent items, either between two charges or between a charge and point P, are all the same.
I. ⊕⊕⊕⋅P
II. ⊕⊕⋅P⊖
III. ⊕⊕⊖⋅P
IV. ⊕⊖⊕⋅P
Correct order of choices in a decreasing order of magnitude of force on P is
(1) II>I>III>IV
(2) I>II>III>IV
(3) II>I>IV>III
(4) III>IV>I>II