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) CCCCc1c(C)[nH]c(N(C)C)nc1=O
(b) CCOP(=S)(OC(C)C)ON1C(=O)c2ccccc2C1=O
(c) O=C(NN=C1SCCS1)c1ccccc1
(d) C=C(C)C=NOC(=O)NC
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}