Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
(a) O=C(c1ccc(Cl)cc1)c1ccccc1-c1ncc[nH]1
(b) O=S(=O)(CCCl)COCS(=O)(=O)CCCl
(c) CCC(C)CCCCC(=O)NC(CCN)C(=O)NC(C(=O)NC(CCN)C(=O)NC1CCNC(=O)C(C(C)O)NC(=O)C(CCN)NC(=O)C(CCN)NC(=O)C(C(C)O)NC(=O)C(CC(C)C)NC(=O)C(CCN)NC1=O)C(C)O
(d) CCOC(=O)C1C(C=C(C)C)C1(C)C
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}