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 CCCNC(=O)NS(=O)(=O)c1ccc(Cl)cc1
b CCCN=C(NCCC)C(OCC)c1ccccc1
c CCCCCCCCCCOC(=O)c1ccccc1C(=O)OCCCCCCCC
d CN(C)C(=O)Nc1ccc(SC(F)(F)Cl)c(Cl)c1
Answer: a
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}