Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a CCOC(=O)C(C)Oc1ccc(Oc2nc3ccc(Cl)cc3s2)cc1
b COc1cc(C(=O)NC2CCCNC2)cc(OC)c1OC
c CCC(O)(c1ccccc1)c1cccc(C(F)(F)F)c1
d OC1(c2cccc(Cl)c2)c2ccccc2C2=NCCN21
Answer: a
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}