Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a. COc1c(Cl)c(Cl)c(OC)c2[nH]c(C(F)(F)F)nc12
b. CC1NC(=O)c2cc(N)ccc2O1
c. CN(C)C(=S)C=Cc1ccc2c(c1)OCO2
d. CCOP(=S)(OCC)Sc1nc(C)cc(C)n1
Answer: d
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}