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(NN=C1C=CC(=NO)C=C1)c1ccccc1
b. Fc1c(Cl)ccc2[nH]c(C(F)(F)F)nc12
c. CCCCNC(=O)n1c(NC(=O)OC)nc2ccccc21
d. c1ccc(-c2nnn[nH]2)cc1
Answer: a
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}