Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
(a) CCO[Si](C)(C)CCl
(b) CCCCCCCCOC(CBr)c1ccc(C2CCCC2)cc1
(c) CN1CCC23c4c5ccc(O)c4OC2C(N=[N+]=[N-])CCC3(O)C1C5
(d) C=CC(=O)NC(C)(C)CC(C)=O
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}