Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
[a] Cn1cnc2c1c(=O)[nH]c(=O)n2C
[b] Cc1cc(=O)c2c(C)ccc(C)c2o1
[c] Cc1c(Cl)ccc(C(C)c2ccccc2)c1C
[d] CCC(=C(c1ccccc1)c1ccc(OCCN(C)C)cc1)c1ccccc1
Answer: d
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}