Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a) C[Si]1(C)N[Si](C)(C)N[Si](C)(C)N1
b) CNc1nc(C)nc(OC)n1
c) CCOP(=O)(N=C1SCCS1)OCC
d) Nc1c(Cl)cc(C(=O)NC2CC2)cc1Cl
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}