Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
(a) COCC(=O)N(c1c(C)cccc1C)C(C)C(=O)OC
(b) CCN(CC)CCNC(=O)c1cc(Cl)c(N)cc1OCc1ccccc1
(c) CSc1ccc2c(c1)N(CCC1CCCCN1C)c1ccccc1S2
(d) CC(=O)Nc1ccc(N)cc1
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}