Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
(a) CSC(C)=NOC(=O)N(C)SSN(C)C(=O)ON=C(C)SC
(b) CCC=CCC=O
(c) CCOP(=S)(OCC)Oc1cc(C)[nH]n1
(d) FC(F)(F)c1nc2c(Cl)c(Cl)c(Br)c(Br)c2[nH]1
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}