Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
(a) COC(=O)CCC(Br)C(C)=O
(b) CCP(=S)(OC(C)C)SCN1C(=O)c2ccccc2C1=O
(c) C=CP(=O)(OCCCl)OCCCl
(d) CC1=C(C(=O)OC(C)C)C(c2cccc([N+](=O)[O-])c2)C(C(=O)OC2CN(C(c3ccccc3)c3ccccc3)C2)=C(N)N1
Answer: b
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}