Find the meaning of the underlined idiom in the given sentence from the option that follow.

The entire college was on cloud nine after winning the competition.

extremely happy

The correct answer is Option (4) → Extremely happy

The idiom "on cloud nine" means to be in a state of great happiness or joy. In this sentence, it indicates that the entire college was extremely happy after winning the competition.

Option (1) refers to energy, not happiness.
Option (2) suggests arrogance or superiority, which is not implied here.
Option (3) refers to ranking, not emotional state.