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: CS(C)=O
b: COC1CCC(OC2CC3(CC(O)C(C)C(C(C)C=C(C)C(=O)C(C)CC(C)C(=O)O)O3)OC2(C)C2CCC(C)C3(OC(C4OC(O)(CO)C(C)CC4C)CC3C)O2)OC1C
c: Fc1c(Cl)c(Br)c2nc(C(F)(F)F)[nH]c2c1Cl
d: CCCCC(CC)C(=O)OCCOCCOCCOC(=O)C(CC)CCCC
e: CCCCCCCCCCCCN1CCN(CC(=O)NN=Cc2ccc([N+](=O)[O-])o2)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}