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 other words.
Options:
a: O=C(O)C(c1ccccc1)c1ccccc1
b: OC(c1ccc(F)cc1)(c1cncnc1)c1ccccc1Cl
c: Clc1ccc(C(c2ccc(Cl)cc2)C(Cl)Cl)cc1
d: Fc1ccc(C(c2ccccc2)(c2ccccc2F)n2ccnc2)cc1
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}