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: C=C(C)CC#N
b: O=C1C=CCC2C3CCCN4CCCC(CN12)C34
c: COc1ccc(C(=O)N2CCCC2=O)cc1
d: O=P(OCCCl)(OCCCl)OC1CC(C(Br)CBr)CCC1Cl
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}