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 other words.
Options:
[a] CCOP(=O)(OCC)Sc1ccc([N+](=O)[O-])cc1
[b] Cc1c([N+](=O)[O-])cccc1[N+](=O)[O-]
[c] COP(=O)(Oc1ccc([N+](=O)[O-])c(C)c1)SC
[d] CCN(CC)C(=O)c1ccccc1OCCO
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}