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 other words.
Options:
(a) O=S1(=O)CCCCO1
(b) O=c1c2ccccc2c(=O)c2c1ccc1[nH]c3c(ccc4c(=O)c5ccccc5c(=O)c43)[nH]c12
(c) Cc1cccc(C)c1N(COCC(C)C)C(=O)CCl
(d) CCCCCCCCCCOC(=O)c1ccccc1C(=O)OCCCC
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}