Read the following pairs: Group of words One-word substitution Decayed with usually a very bad or disgusting smell Putrid Humorous in a clever and often ironic way Wry In a state of tremulous excitement Aflutter Select the pairs wherein the one-word substitution is correctly stated.

Step-by-step solution

The word 'Putrid' means decaying or rotting and emitting a fetid smell, which matches the first description. The word 'Wry' means using or expressing dry, especially mocking, humour, which matches the second description. The word 'Aflutter' means in a state of nervous or excited agitation, which matches the third description. All three pairs are correctly matched. Answer: I, II and III