Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a. O=C(Cc1ccc2c(c1)OCc1ccccc1C2=O)OCC(O)CO
b. COc1ccc2c(c1)c(CC(=O)Oc1cccc(C(F)(F)F)c1)c(C)n2C(=O)c1ccc(Cl)cc1
c. CCCOC(=O)C1c2cc3c(cc2CC(C)C1C(=O)OCCC)OCO3
d. Cc1nn(C)c(=O)c2noc(C)c12
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}