Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
(a) CN(C)CCCN1c2ccccc2Sc2ccc(C(F)(F)F)cc21
(b) Oc1c(Br)c(Br)c(Br)c(Br)c1Br
(c) CN(C)C(=O)CCCOC(=O)C(C)(C)Oc1ccc(Cl)cc1
(d) N#Cc1cccc([N+](=O)[O-])c1C#N
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}