Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a.) CCn1nc(C(=O)O)c(=O)c2cc3c(cc21)OCO3
b.) CCCCOC(=O)N(C)SN(C)C(=O)Oc1cccc2c1OC(C)(C)C2
c.) O=C(O)CCSCCC(=O)O
d.) CON1CCC(=Cc2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)C1=O
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}