Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a. CCCCOCCC#N
b. CN(CCC(N)CC(=O)NC1C=CC(n2ccc(N)nc2=O)OC1C(=O)O)C(=N)N
c. COP(=O)(OC)SC(P(=O)(OC)OC)=P(OC)(OC)OC
d. CCC(=O)OC(=O)CC
Answer: a
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}