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] COc1ccc(C(N)=O)cc1C(=O)NCc1cccnc1
[b] CCOP(=O)(OCC)Oc1ccc(S(C)(=O)=O)cc1
[c] Cc1ccc(N)cc1[N+](=O)[O-]
[d] CC(=O)Nc1ccc(C)c(NS(=O)(=O)C(F)(F)F)c1
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}