Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a.) CC(=O)OC1=C(c2c(C)cc(C)cc2C)C(=O)c2ccccc21
b.) OC(CCl)COCCCCCOCC(O)CCl
c.) CN(CCO)c1ccc(N=Nc2c(Cl)cc([N+](=O)[O-])cc2Cl)cc1
d.) CCC(C)C(C)(COC(N)=O)COC(N)=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}