Which of the following sequences give a primary alcohol as the major product after the final aqueous work-up?

AEthylene oxide with $CH X_{3} MgBr$ , then $H X_{3} O X^{+}$
BBut-1-ene with dilute $H X_{2} SO X_{4}$ , then $H X_{2} O$
C $HCHO$ with $C X_{2} H X_{5} MgBr$ , then $H X_{3} O X^{+}$
D2-Methylpropene with $BH X_{3}$ /THF, then $H X_{2} O X_{2}$ / $NaOH$

Answer: A, C, D

Ethylene oxide gives propan-1-ol, methanal gives propan-1-ol, and hydroboration of 2-methylpropene gives 2-methylpropan-1-ol (anti-Markovnikov), all primary. Acid hydration of but-1-ene follows Markovnikov's rule and gives butan-2-ol, a secondary alcohol.

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Which of the following sequences give a primary alcohol as the major product after the final aqueous work-up?

Answer: A, C, D

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