Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a C=CCSc1nnc(CSP(=S)(OCC)OCC)s1
b CCOC(C1=NCCCN1)c1cccc(F)c1
c C=CC=NNc1ccccc1
d CSCC(=O)N(C)C(=O)Oc1ccccc1OC(C)C
Answer: d
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}