The correct sequence of reagents to effect the following transformation is
1
i. CH3CO3H, H+ then 2N H2SO4; ii. LDA, Mel; iii. DIBAL-H, -78°C
2
i. DIBAL-H, -78°C; ii. CH3CO3H, H+ then 2N H2SO4; iii. LDA, Mel
3
i. CH3CO3H, H+ then 2N H2SO4; ii. DIBAL-H, -78°C; iii. LDA, Mel
4
i. LDA, Mel; ii. DIBAL-H, -78°C; iii. CH3CO3H, H+ then 2N H2SO4