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)CCCc1ccc(N(CCCl)CCCl)cc1
[b] CCCOc1ccc(C(CN(C)C)C(C)CC)cc1Cl
[c] CCCCCC(CC)c1cc([N+](=O)[O-])c(OC(=O)OC)c([N+](=O)[O-])c1
[d] OC(CCl)CNc1ccccc1NCC(O)CCl
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}