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. CCCCCCCCN(C)C
b. CCOP(=S)(OCC)OCCS(=O)CC
c. C=CN(CC)C(C)=O
d. CCOP(=O)(OCC)Oc1ccc2c(C)c(Cl)c(=O)oc2c1
e. CCCCNC1(P(=O)(OCCCC)OCCCC)CCCCC1
Answer: e
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}