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, or d without using any additional words.
Options:
a.) Cn1c(=O)c2c(ncn2CCO)n(C)c1=O
b.) CC(C(c1ccc(Cl)cc1)c1ccc(Cl)cc1)[N+](=O)[O-]
c.) CCCCn1c(=O)n(CCC)c(=O)c2[nH]c(C)nc21
d.) OC1(c2ccccc2)c2cc(F)ccc2C2=NCCN21
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}