Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
a. C=CC(=O)NC(C)(C)CC(C)=O
b. CCOP(=O)(OC=CCl)OCC
c. CNC(=O)Oc1cccc2c1OC(C)(C)C2
d. N#CCCNCCC#N
e. Cc1cc(NC(=O)c2ccccc2O)n(-c2ccccc2)n1
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}