Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a: CCOP(=O)(OCC)SCc1nnc(OCCOC)s1
b: COc1ccc(Oc2ccc(NC(=O)N(C)C)cc2)cc1
c: O=C=Nc1ccc(Cl)c(Cl)c1
d: C=CC(C)(CCC=C(C)C)OC(=O)c1ccccc1N
Answer: c
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}