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 other words.
Options:
a: CCOP(=O)(OCC)Oc1ccc2c(C)c(Cl)c(=O)oc2c1
b: FC(F)(F)c1nc2c(Br)c(Cl)c(Br)cc2[nH]1
c: CC(C)=CC1C(C(=O)OCc2coc(Cc3ccccc3)c2)C1(C)C
d: CCNC(=O)C(SP(=S)(OC)OC)C(=O)NCC
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}