The allelochemical allyl isothiocyanate is found in the plant:

Correct option is B

The correct answer is (B) Mustard

Explanation:
• Allyl isothiocyanate is a secondary metabolite found in plants of the Brassicaceae family, particularly mustard.
• It is responsible for the pungent taste and sharp aroma of mustard seeds and oil.
• In the context of Allelopathy, this chemical can inhibit the germination and growth of other nearby competing plants or pests.

Information Booster:
• Sorghum: Contains 'Sorgoleone' and 'Dhurrin' (cyanogenic glycoside) as allelochemicals.
• Coffee: Contains Caffeine, which can act as an allelopathic agent in soil.
• Walnut: Contains 'Juglone', a famous allelochemical.

Additional Knowledge:
• Allelopathy is the biochemical interaction between plants, which can be either inhibitory (detrimental) or stimulatory.
• Isothiocyanates are being researched for their bio-fumigant properties in organic farming.