Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a.) Cc1ccc(N(CC2=NCCN2)c2cccc(O)c2)cc1
b.) CCC1(c2ccccc2)C(=O)NCNC1=O
c.) Clc1ccc2c(c1)C(N1CCNCC1)=Nc1ccccc1O2
d.) CCCCOC(=O)C1CCC(C(=O)OCCCC)C1
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}