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) CC(C)c1cccc(OC(=O)N(C)N=O)c1
b) COP(=S)(OC)SCc1nnc(SC(C)C)s1
c) Cc1ccc(C(C)C=O)cc1
d) CCO[Si](OCC)(OCC)c1ccccc1
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}