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 other words.
Options:
a) CCCCCCCCC=CCCCCCCCC(=O)OCCOC
b) CN(C)C(=O)N(C)N=O
c) COc1ccc(CC2NCC(O)C2OC(C)=O)cc1
d) CCOC(=O)CC(SP(=S)(OC)OC)C(=O)OCC
e) ClCC(Cl)=C(Cl)Cl
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}