Thank you for reporting, we will resolve it shortly
Q.
In Grignard reagent the carbon-magnesium bond is
JamiaJamia 2006
Solution:
In Grignard reagent $ R-Mg-X $ or $ H-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-Mg-X $ The $ C-Mg $ bond is covalent.