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 CCN(CC)c1ccc(-c2nc(=O)n(C)nc2-c2ccc(N(CC)CC)cc2)cc1
b CO[Si](CCS)(OC)OC
c CC(=O)OC1(C)CCC23CC1C(C)(C)C2CCC3C
d O=CC=CC1CO1
e CCCCC(=O)CC
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}