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. Cc1cc(C)c(Cc2cc(C)c(C)cc2C)cc1C
b. CNCCCN1c2ccccc2CCc2ccccc21
c. OC1CCN(c2ccc(-c3ccc(Cl)cc3Cl)nn2)CC1
d. CNc1c(Cl)cc(C(=O)NC2CC2)cc1Cl
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}