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 additional words.
Options:
a) CCCCCCCCCCCC(=O)NP(=O)(OC)SC
b) CCO[Si](C)(CCl)OCC
c) CC(Oc1ccc(Oc2nc3ccc(Cl)cc3o2)cc1)C(=O)O
d) Oc1ccc(Nc2ccccc2)cc1
Answer: b
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}