• Sulfenimide / Phthalimide Fungicides:
• Captan: $N$-(trichloromethylthio)cyclohex-4-ene-1,2-dicarboximide.
• Folpet: $N$-(trichloromethylthio)phthalimide.
• Captafol: $N$-(1,1,2,2-tetrachloroethylthio)cyclohex-4-ene-1,2-dicarboximide, possessing the tetrachloroethane sulfenyl group.
• Boscalid is a pyridine-carboxamide fungicide and lacks a phthalimide or sulfenyl moiety.
• Conclusion: (A), (B), and (D) are phthalimide/tetrahydrophthalimide sulfenyl derivatives (Option 1).

Correct option: (1) (A), (6) and (D) only.