02.24: Two small hollow metal spheres hung on insulati
xfn/.xu7jo;dd ne +h,ng threads attract one another as sho
euno7+ .,d jxhfn;d /xwn. It is known that a positively charged rod will attract ball A.
I. Ball A has a positive charge
II. Ball B has a negative charge
III. Ball A and Ball B have opposite charges
Which of the above can be correctly concluded about the charge on the balls?