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. Cc1c(Cl)cccc1Nc1ncccc1C(=O)O
b. C=CS(=O)(=O)C=C
c. CC(=O)OCOC(=O)C1=C(COC(N)=O)SC2C(C(C)O)C(=O)N12
d. N#CC(=C1SCC(c2ccccc2Cl)S1)n1ccnc1
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}