Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
a) C=CCC1(C(C)CC)C(=O)NC(=O)NC1=O
b) CCOc1ccccc1N1CCN(CCCCc2ccc3c(c2)CCC(=O)N3)CC1
c) Cc1cccc(C)c1NC1=NCCCS1
d) CC#N
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}