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. C=CCN(C1=NCCN1)c1c(Cl)cccc1Cl
b. CC1CN1P(=O)(N1CC1C)N1CC1C
c. CN1C(=O)CN2CCc3ccccc3C2c2cc(Cl)ccc21
d. CCOC(=O)c1c[n+](CC)c2n(c1=O)C(C)CCC2
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}