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, d, or e without using any additional words.
Options:
a. CC(=O)SCC(=O)Nc1nc2ccccc2s1
b. CCC(=O)OC1CCC2C3CCC4=CC(=O)CCC4(C)C3CCC12C
c. S=C1SSC2=NCCN12
d. CC1(C)CON(Cc2ccccc2Cl)C1=O
e. C=CCCCC=CCO
Answer: a
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}