To solve this problem, we need to identify the chemical process used to synthesize the drug 'Heroin' from morphine. Let's analyze each option:$\newline \bullet$Option 1: Methylation of morphine$\newline$ - Methylation involves the addition of a methyl group (CH$_3$) to a molecule.$\newline$ - This process is not used to synthesize heroin from morphine.$\newline \bullet$Option 2: Acetylation of morphine$\newline$ - Acetylation involves the addition of an acetyl group (CH$_3$CO) to a molecule.$\newline$ - Heroin is synthesized by acetylating morphine, specifically by adding acetyl groups to the hydroxyl groups of morphine.$\newline$ - This process converts morphine into diacetylmorphine, commonly known as heroin.$\newline$ - Therefore, this is the correct process for synthesizing heroin.$\newline \bullet$Option 3: Glycosylation of morphine$\newline$ - Glycosylation involves the addition of a sugar moiety to a molecule.$\newline$ - This process is not used to synthesize heroin from morphine.$\newline \bullet$Option 4: Nitration of morphine$\newline$ - Nitration involves the addition of a nitro group (NO$_2$) to a molecule.$\newline$ - This process is not used to synthesize heroin from morphine.$\newline$Based on the analysis, the correct option is:$\newline$Option 2: Acetylation of morphine$\newline$This corresponds to the correct option, which is Option 2.