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, d, or e without using any other words.
Options:
a: COC(=S)SSC(=S)OC
b: COP(=O)(OC)SC(CC(=O)OC(C)C)C(=O)OC(C)C
c: CO[SiH](C)OC
d: FCOC(C(F)(F)F)C(F)(F)F
e: c1ccc2sc(SN(C3CCCCC3)C3CCCCC3)nc2c1
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}