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)CCNC(=O)c1cc(Cl)c(N)cc1OC
b) CCOP(=S)(OCC)SCn1nc(Br)ccc1=O
c) O=C(NO)c1ccccc1O
d) CCOc1nnc(CSP(=S)(OCC)OCC)s1
e) CCOC(CC)(C1=NCCCN1)c1ccccc1
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}