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. COc1nn(-c2ccccc2OC)c(=O)o1
b. CCOP(=S)(OCC)SC=C(C)SC
c. NS(=O)(=O)c1cc2c(cc1Cl)NCNS2(=O)=O
d. CCCCN(N=O)C(N)=O
e. CNC(=O)c1cc(OC)n(-c2cccc(Cl)c2)n1
Answer: d
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}