Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a) CCNc1nc(NCC)nc(SC)n1
b) CCOC(=O)C(O)(c1ccc(Cl)cc1)c1ccc(Cl)cc1
c) CCCCCCOC(CBr)c1ccc(C2CCCCC2)cc1
d) CNCCCN1c2ccccc2CCc2ccccc21
e) C=CCn1c(=O)c2[nH]c(C)nc2n(CC(C)C)c1=O
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}