Option 1 -> Fresh means new and unspoiled, which is the opposite of putrid.
Option 2 -> Pristine means pure and in original condition, which is the opposite of putrid.
Option 3 -> Decayed means decomposed or rotten, which matches the meaning of putrid.
Option 4 -> Choleric means bad-tempered or irritable, unrelated to the concept of decay.
Hence, Option 3: Decayed -> Putrid describes something that is decomposing, rotten, or foul-smelling, making "decayed" the correct synonym as both words refer to the process of decomposition and deterioration -> correct