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 other words.
Options:
a: c1ccc2c(c1)-c1cccc3cccc-2c13
b: COc1ccc2c(c1)c(CC(=O)OC(C)c1ccccc1)c(C)n2C(=O)c1ccc(Cl)cc1
c: COCC(=O)NP(=O)(OC)SC
d: CS(=O)(=O)OCC1OC1C1OC1COS(C)(=O)=O
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}