Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a. FC(F)(F)c1nc2c(Cl)c(Cl)c(Br)c(Br)c2[nH]1
b. CCNC(=O)C(Cl)=C(C)OP(=O)(OC)OC
c. N#CC(Cl)(Cl)CCl
d. C1CC2CC1CC2CNCC1CC2CCC1C2
e. CC(C)C(C)N
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}