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, d, or e without using any additional words.
Options:
a.) O=C(O)CN(CCOCCOCCN(CC(=O)O)CC(=O)O)CC(=O)O
b.) COP(=S)(OC)Oc1ccc2c(C)cc(=O)oc2c1
c.) Nc1nc2cccc(Cl)c2o1
d.) Fc1c(F)c(F)c2[nH]c(C(F)(F)F)nc2c1F
e.) C=COC(=O)CCC
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}