Slow-reacting substance of anaphylaxis ( SRS-A ) 為强力的支氣管收縮劑，其成分為下列何者？
Leukotrienes \mathrm{C}_{4},\mathrm{D}_{4},\mathrm{E}_{4}
\mathrm{C}_{4}
\mathrm{D}_{4}
\mathrm{E}_{4}
Leukotrienes \mathrm{B}_{4},\mathrm{C}_{4},\mathrm{D}_{4}
\mathrm{B}_{4}
Prostaglandin \mathrm{E}_{1},\mathrm{F}_{1}
\mathrm{E}_{1}
\mathrm{F}_{1}
Histamine
