Sinalbin and sinigrin are isothiocyanate glycosides. Sinigrin acted upon with myrosinase produces acrinyl isothiocyanate.

• A. The first statement is correct whilst the second statement is incorrect
• B. The first statement is incorrect whilst the second statement is correct
• C. Both statements are correct
• D. Both statements are incorrect

Answer: (A)

Glucosinolates like sinalbin and sinigrin are glycosides that, when cleaved by the enzyme myrosinase, release an isothiocyanate as a main hydrolysis product. Specifically, sinigrin yields allyl isothiocyanate, while sinalbin yields p-hydroxybenzyl isothiocyanate. This makes the statement that they are isothiocyanate glycosides correct. The claimed product acrinyl isothiocyanate is not correct; the actual product from sinigrin is allyl isothiocyanate.