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, d, or e without using any additional words.
Options:
a CC(C(N)=O)(c1ccccc1)c1ccc(N)cc1
b CCCCCCCCCCCCCCCCCC1=NCCN1
c CNC(=O)ON=C1SCCS1
d CCN1CCCC1CNS(=O)(=O)c1cc(Cl)c(N)cc1OC
e CCOC(=O)C1CCc2cc(C3CCCCC3)ccc21
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}