Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
[a] NC1=NC(C(F)(F)F)(C(F)(F)F)NC1(C(F)(F)F)C(F)(F)F
[b] Nc1ncc2nc[nH]c2n1
[c] CNC(=O)c1cc(OC)n(-c2cccc(Cl)c2)n1
[d] CC1(C)C2CCC1(C)C(OC(=O)CSC#N)C2
Answer: a
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}