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(Cc1ccccc1)(NC(=O)CN)c1ccccc1
b. CCSC(SCC)c1ccccc1OC(=O)NC
c. O=[N+]([O-])c1cc([N+](=O)[O-])c(O)c([N+](=O)[O-])c1
d. Cc1cc(Cl)ccc1OCC(=O)OCCCCCC(C)C
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}