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 other words.
Options:
a) C[Si](C)(C)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C
b) CC1(C)COC(c2ccccc2)CN1
c) O=C(O)c1ccncc1
d) CC(=O)CC(C)(C)O
e) O=C1CCc2cc(C=CCN3CCN(c4cccc(Cl)c4)CC3)ccc2N1
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}