Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (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 O=C(O)c1nn(Cc2ccc(Cl)cc2Cl)c2ccccc12
b CCOC(=O)C1(c2ccccc2)CCCN(C)CC1
c CCC(=O)OC1(c2ccccc2)CCN(C)CC1C
d CCCCc1c(C)[nH]c(NCC)nc1=O
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}