Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a. COP(C)(=S)SCn1c(=O)oc2cc(Cl)cnc21
b. Cn1cnc2c1c(=O)[nH]c(=O)n2C
c. C1CCCC1
d. O=[N+]([O-])c1cc2c(ccc3ccccc32)o1
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}