Concept:The word "calm" means peaceful and free from agitation.
We must select the option that is its closest opposite and fills the gap correctly.
Explanation:"Calm" describes a state of tranquility and stillness.
Its opposite is a state of agitation or the inability to remain still.
"Restless" means unable to relax or stay quiet, which directly contrasts with "calm".
"Hungry" refers to a physical need for food and is unrelated to calmness.
"Angry" names an emotion, but it does not directly oppose the state of being calm.
"Cheerful" is a positive mood and is not opposite to "calm".
Hence, the word most nearly opposite in meaning to "calm" is "restless".
Answer:A. restless