Which of the following compounds will give tertiary butanol as the major product when treated with excess of MeMgBr?

Which of the following compounds gives a tertiary amine on reduction ? .

Which of the following compounds will give same major product on acid catalysed hydration ?

Which of the following compounds when started with one mole, will give two moles of CH_4 when treated with excess of methyl magnesiuin broinide?

Tertiary alcohol is obtained as major product in :