R - X + Mg (ether)---> R --Mg --X
In Ur Qs
R ---> HC CH2----
So product is HC CH2----Mg ---Br
So ans is TRUE
R - X + Mg (ether)---> R --Mg --X
In Ur Qs
R ---> HC CH2----
So product is HC CH2----Mg ---Br
So ans is TRUE
If the reagent was
CH3---MgBr
& it were acting on CH2Br--C H
Then the ans wud be CH2Br --- C MgBr
Then ya ans is FALSE