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, or d without using any other words.
Options:
(a) O=C=Nc1ccc(Cc2ccc(N=C=O)cc2)cc1
(b) OCCNCCOc1ccc(C(=C(c2ccccc2)C(F)(F)F)c2ccccc2)cc1
(c) N#Cc1cc(-c2ccccc2)nnc1NCCN1CCOCC1
(d) O=C1NCC2(CCN(CCc3ccccc3)CC2)O1
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}