MCQ
The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is
- ✓Geometrical isomerism
- BCoordination isomerism
- CIonization isomerism
- DLinkage isomerism

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Assertion $A$: Helium is used to dilute oxygen in diving apparatus.
Reason $R:$ Helium has high solubility in $O _2$.
In the light of the above statements, choose the correct answer from the options given below
