Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a. CC(C(=O)O)c1ccc2oc(-c3ccc(F)cc3)nc2c1
b. O=P(N1CC1)(N1CC1)N1CC1
c. O=C1C2CC=CCC2C(=O)N1SC(Cl)(Cl)C(Cl)Cl
d. C1C2CC3OC3C2CC2OC12
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}