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, d, or e without using any other words.
Options:
a: S=C1NCNCN1
b: CCC1(c2ccccc2)CCC(=O)NC1=O
c: COP(=S)(OC)SCCSC(C)C
d: CCCS(=O)(=O)c1c(Cl)cnc(Cl)c1Cl
e: CCCOP(=O)(CC)SC
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}