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 additional words.
Options:
a.) CCOP(=S)(OCC)SCC(=O)N(C)C(N)=O
b.) N=C(N)NCC1CCC(C(=O)Oc2ccccc2C(=O)OCc2ccccc2)CC1
c.) c1ccc(COCc2ccccc2)cc1
d.) CCC1=CSC(S)N1
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}