<div>
Rushil’s new share: \( 4 - \frac{2}{7} = \frac{28}{7} - \frac{2}{7} = \frac{26}{7}. \)
Abheer’s new share: \( 3 - \frac{1}{7} = \frac{21}{7} - \frac{1}{7} = \frac{20}{7}. \)
Sunil’s share: \( \frac{3}{7}. \)
Combine to find the new ratio:
Rushil : Abheer : Sunil = \frac{26}{7} : \frac{20}{7} : \frac{3}{7} = 26 : 20 : 3 = 13 : 10 : 3 (on simplifying).
</div>
The correct IUPAC name of \([ \text{Pt}(\text{NH}_3)_2\text{Cl}_2 ]^{2+} \) is: