Which of the following gives $2°$-alcohol as a major product with ${\mathrm{CH}}_3\mathrm{MgBr}$ followed by ${\mathrm{H}}_2\mathrm{O}$

In the reaction

The major product of the following reaction is:

The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is:

$\left(i\right)$

$\left(ii\right)$

$\left(iii\right)$

$\left(iv\right)$

In the reaction given below what will be the major product at the end :

The major product of the following reaction is:

The major product of the following reaction is: