Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a) OC(c1ccc(F)cc1)(c1cncnc1)c1ccccc1Cl
b) O=CN(c1ncnc2c1ncn2C1CC1)C1CC1
c) CN(C)CCCN1c2ccccc2CCc2ccc(Cl)cc21
d) CCOP(=O)(N=C1SCC(C)S1)OCC
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}