Consider a 0.3 M solution of cis-OsO₂F₄ in neat SbF₅. The ¹⁹F NMR spectrum of the Os containing species in this solution shows a doublet and a triplet at 122.4 ppm and 129.5 ppm, respectively. The Os species generated is

Correct option is A

Fluorine-19 nuclear magnetic resonance spectroscopy (fluorine NMR or ¹⁹F NMR) is an analytical technique used to detect and identify fluorine-containing compounds. Fluorine atoms can couple with each other.
[OsO₂F₃]⁺ has a trigonal bipyramidal geometry. Osmium shares a plane with two fluorine atoms and an oxygen at 120° angles to each other in  equatorial positions, and one fluorine atom above and one oxygen atom below the plane ( axial or  apical positions). The ¹⁹F NMR spectrum helps in predicting the structure based on the chemical environment of the fluorine atoms. There are two kinds of fluorine atoms present in the Os species. Fa will couple with two F_b and will give a triplet. Two similar F_b will couple with one F_a and will give a doublet.