The correct answer is D. Primin.

The pictured plant is the primrose; allergic contact dermatitis to this plant is mediated by primin.

Diallyl sulfide is found in garlic. Sesquiterpene lactones are found in the Compositae family. Colophony is found in Pinus palustris tree.  Tuliposide A is found in the Peruvian lily.

References: McGovern TW. Dermatoses due to plants. In J Bolognia, JL Jorrizzo, RP Rapini, Eds. Dermatology. CITY: Mosby, 2003.