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 CN(C)CC=C(c1ccc(Br)cc1)c1cccnc1
b CN(C)CCCn1c2c(c3ccccc31)CCCCCC2
c Cc1c(CC(=O)O)c2ccccc2n1C(=O)c1ccccc1
d O=S1(=O)CCN(c2ccccc2)CC1
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}