MCQ
The transition metal used in $X-$ rays tube is
- ✓$Mo$
- B$Ta$
- C$Tc$
- D$Pm$
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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
