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) CC(=O)c1c2c(c(C)[nH]c1=O)CC(c1ccncc1)CC2
(b) O=[N+]([O-])OCC(CO[N+](=O)[O-])O[N+](=O)[O-]
(c) Cc1cccc(N2CC(CO)OC2=O)c1
(d) COP(=S)(Cl)Cl
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}