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 additional words.
Options:
a: Fc1ccc(C(c2ccccc2)(c2ccccc2F)n2ccnc2)cc1
b: C=CCn1c(=O)c2[nH]c(C)nc2n(CCCC)c1=O
c: COC1CCC=CO1
d: Nc1ccc(C(=O)Nc2ccccc2N)cc1
Answer: c
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}