Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (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) COc1ccc2c(c1)N(CCC1CCCCN1C)c1ccccc1S2
(b) C[N+]([O-])=NCOC1OC(CO)C(O)C(O)C1O
(c) NC(=O)c1ccc(Cl)c([N+](=O)[O-])c1
(d) CC(=O)c1ccc(N)cc1
Answer: b
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}