Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a CN1CCN(C(=O)Cn2c(=O)sc3ccc(Cl)cc32)CC1
b CCOC(=O)C(SP(=O)(OC)SC)c1ccccc1
c O=c1[nH]cnc2c1ncn2C1OC(COP(=O)(O)O)C(O)C1O
d CCOC(=O)N1CCC=C(C=NOC)C1
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}