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. O=C(O)CNC(=O)c1ccc(Cl)cc1
b. O=C(O)Cc1cc(I)c(Oc2cc(I)c(O)c(I)c2)c(I)c1
c. CC(C)(O)c1ccccc1
d. COc1c(OP(=S)(OC(C)C)OC(C)C)cnn(C)c1=O
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}