Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a: COP(=S)(OC)SCC(=O)N(c1ccc(Cl)cc1)C(C)C
b: C=CCn1c(=O)n(CC=C)c(=O)n(CC=C)c1=O
c: CC(=O)C=Cc1ccccc1
d: CC(C)OP(=S)(OC(C)C)SCCNS(=O)(=O)c1ccccc1
Answer: d
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}