Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a. Cc1ccccc1NC(=N)Nc1ccccc1C
b. O=C1CC2CC(O1)C1CCCC21
c. OCC1CCc2cc(C3CCCCC3)ccc21
d. c1cc(-c2ccncc2)ccn1
e. O=C(O)CCC1(Cc2ccccc2)CCCCC1=O
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}