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 COc1ccc(-c2cc(N)c3c(c2O)C(=O)c2c(N)ccc(O)c2C3=O)cc1
b O=C1CCc2ccccc2O1
c CCOP(=O)(OCC)N(SN(C)C(=O)ON=C(C)SC)C(C)C
d C=CC(=O)OCCSC
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}