Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a) CCCC1(c2cccc(O)c2)CCN(C)CC1C
b) Cc1ccc(C)[nH]1
c) O=C1CCc2cc(C(=O)CCCN3CC=C(c4ccccc4)CC3)ccc2N1
d) CCCc1nc(C)cc(OP(=S)(OCC)OCC)n1
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}