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, d, or e without using any other words.
Options:
a: Cc1c(-c2ccccc2)[nH]c(N)nc1=O
b: C=CCNC(N)=S
c: COC(=O)CCC(Br)C(C)=O
d: O=C(Cc1ccc(-c2ccccc2)cc1)OCCF
e: COC(C)=NC#N
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}