Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a.) CCOC(C1=NCC(C)(C)CN1)c1ccccc1Cl
b.) COc1ccc2c(c1)c(CC(=O)OCOC(=O)c1ccccc1)c(C)n2C(=O)c1ccc(Cl)cc1
c.) COc1ccc(NC(=O)CC(C)=O)cc1
d.) O=c1[nH]c2cc(Br)ccc2o1
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}