Option 1 -> irritable means easily annoyed or bad-tempered, which is unrelated to salubrious.
Option 2 -> opinionated means having strong, assertive views, which doesn't connect to the meaning of salubrious.
Option 3 -> pleasant means agreeable and enjoyable, which aligns with salubrious meaning health-giving, wholesome, and conducive to well-being.
Option 4 -> worthy means deserving of attention or respect, which doesn't capture the health-promoting essence of salubrious.
Hence, Option 3: pleasant -> Salubrious describes something that is health-giving, wholesome, and promotes well-being, making "pleasant" the closest synonym as it conveys a positive, agreeable quality -> correct