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] FC(F)(F)c1nc2c(Br)c(Cl)c(Cl)cc2[nH]1
[b] CO[SiH](OC)OC
[c] Cc1ccccc1OP(=O)(Oc1ccccc1C)Oc1ccccc1C
[d] ClCC(Cl)(Cl)CCl
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}