Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
a) OC(CCl)CNCCNCC(O)CCl
b) BrC(Br)Br
c) CC(CC(=O)O)c1ccc(-c2ccccc2F)cc1
d) Cc1ncc2n1-c1ccc(Cl)cc1C(c1ccccc1F)=NC2
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}