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, or d without using any additional words.
Options:
a. CCN(CC)c1ccc2c(C)cc(=O)oc2c1
b. CCS(=O)CCSP(=S)(OC)OC
c. N#CSC=CSC#N
d. O=[N+]([O-])c1ccc(Nc2ccccc2)c(S(=O)(=O)O)c1
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}