Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
(a) CN1CCN=C(c2ccccc2)c2cc(Cl)ccc21
(b) CC(=O)C=C(C)C
(c) CCCCC(CC)CO[Si](OCC(CC)CC)(OCC(CC)CC)OCC(CC)CCCC
(d) C=CCSCC=C
(e) CC(=O)OC(C(Cl)(Cl)Cl)P(=O)(Oc1ccccc1)Oc1ccccc1
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}