Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
[a] O=C(O)CCc1nc(-c2ccccc2)c(-c2ccccc2)o1
[b] CCCCCCC(C)=O
[c] CN(C)[N+](=O)[O-]
[d] CCOP(=S)(OCC)SCn1c(=O)sc2ccccc21
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}