From which of the following is tertiary butyl alcohol obtained by the action of methyl magnesium iodide?

The product of the following reaction is ...............
$(CH_3)_3C-CH=CH_2 \xrightarrow[(ii) \, NaBH_4 + NaOH]{(i) \, Hg(CH_3COO)_2; \, THF} ?$

The only alcohol that can be prepared by the indirect hydration of alkene is

Which of the following alcohols cannot be prepared from the hydration of an alkene?

Consider the following reaction sequence:
$CH_3-CH(OH)-CH_3$ $\xrightarrow{PBr_3} (X)$ $\xrightarrow{Mg} (Y)$ $\xrightarrow{C_2H_4O (epoxide)} (Z)$ $\xrightarrow{H_2O, \Delta} ?$
What is the final product of this reaction?

Which reaction will give $CH_3-CH(CH_3)-CH(OH)-CH_3$ as a major product?