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 other words.
Options:
a. ClC1=C(Cl)C2(Cl)C3C(Br)C=CC3C1(Cl)C2(Cl)Cl
b. CCCCCCCCCCOC(=O)c1ccccc1C(=O)OCCCCCCCC
c. CCCN=C(NCCC)C(OCC)c1ccccc1
d. CS(=O)(=O)Nc1ccc([N+](=O)[O-])cc1Oc1ccccc1
Answer: d
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}