Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a. COc1c(OP(=S)(OCC(C)C)OCC(C)C)cnn(C)c1=O
b. CCCCCCCC(=O)Oc1c(I)cc(C#N)cc1I
c. O=C(NP(=O)(N1CC1)N1CC1)c1cc(I)ccc1I
d. NC(=S)Nc1cccc(Cl)c1
e. COP(=S)(OC)SC(SP(=S)(OC)OC)c1ccccc1
Answer: b
Task: Please answer the multiple choice question.
Question: Which molecule has the highest {acute_toxicity__names__noun}?
Constraint: Even if you are {#uncertain|not sure!}, you must pick either {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%acute_toxicity%}
Answer: {%multiple_choice_result}