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) CC1COC2(c3ccccc3Cl)c3cc(Cl)ccc3NC(=O)CN12
(b) O=C1CN=C(c2ccccc2)c2c(sc3c2CCCC3)N1
(c) C=COCC(C)CCCC(C)CC(C)C
(d) C#CC(=O)O
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}