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, d, or e without using any additional words.
Options:
a. CCN(CC)c1nc(Cl)nc(N(CC)CC)n1
b. OC1(c2ccc(F)cc2)c2ccccc2C2=NCCN21
c. O=C(O)C1CCC(C(=O)O)C1
d. OC(c1ccccc1)(c1ccccc1)C1CCCCN1
e. CC(C)(C)c1ccc(CSc2cnn(C(C)(C)C)c(=O)c2Cl)cc1
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}