Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any other words.
Options:
a: CC(C)NNC(=O)c1ccncc1
b: CCC=CCCO
c: CN1C(=O)CN=C(c2ccccc2F)c2c1ccc(NC(=O)N1CCOCC1)c2Cl
d: O=C1CCCN1
e: O=C(O)Cc1ccccc1Nc1c(Cl)ccc(O)c1Cl
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}