MCQ
Which of the following statement is true
- A$78^{\mathrm{Pt}^{192}}$ has $78$ neutrons
- B$84^{\mathrm{PO}^{214}} \rightarrow 82^{\mathrm{Pb}^{210}}+\beta^{-}$
- ✓$92^{\mathrm{U}^{288}} \rightarrow 90^{\mathrm{Th}^{284}}+2^{\mathrm{He}^4}$
- D$90^{\mathrm{Th}^{234}} \rightarrow 91^{\mathrm{Pa}^{234}}+2^{\mathrm{He}^4}$