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 additional words.
Options:
[a] CN(C)S(=O)(=O)CCNC(=O)N(CCCl)N=O
[b] O=C(O)CCc1nc2ccccc2[nH]1
[c] O=C1NCCN1N=Cc1ccc([N+](=O)[O-])o1
[d] FC(F)(F)c1nc2c(Br)c(Br)c(Br)cc2[nH]1
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}