Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a: CCCC#N
b: O=[N+]([O-])c1cc2[nH]c(C(F)(F)F)nc2c(Cl)c1Cl
c: CCCn1c(C)cc(=NC(=O)c2ccccc2O)n1-c1ccccc1
d: C=COCCSCCCC
Answer: d
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}