Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a) Cc1cccc(N2CCN(CCCCN3C(=O)CNC3=O)CC2)c1
b) CCCCOCCOCCCO
c) O=S1c2ccccc2N(CCCN2CCN(CCO)CC2)c2cc(Cl)ccc21
d) CC(C(=O)COC(=O)c1ccncc1)c1ccc(-c2ccccc2F)cc1
e) c1ccc(OCC2CO2)cc1
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}