MCQ
The last member of inert gas elements is
- AHelium
- BNeon
- CArgon
- ✓Radon
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Which of the following cation does not respond to the above reaction ?

$PhCHO + Ph \cdot CHO \xrightarrow[in\,\,{{D}_{2}}O]{NaOD} A + \begin{matrix} O \\ || \\ Ph-C-{{O}^{-}} \\ \end{matrix}$$\left( Ph\right.$ is $\left.- C _{6} H _{5}\right)$
