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.) COP(=O)(N=C1SCC(C)S1)OC
b.) C1CN2CCN1CC2
c.) O=[N+]([O-])c1cncn1CCN1CCOCC1
d.) O=C1CCC(C(=O)NC2CC2c2ccccc2)N1
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}