Classification (musical instruments – family): Three are string instruments; one is a wind instrument. Identify the odd one out.

Introduction / Context:
Instrument-family classification is a common verbal topic. Guitar, violin, and veena are stringed instruments that produce sound via vibrating strings. A flute is a wind/woodwind instrument that produces sound from the vibration of air columns. The family difference (string vs wind) sets up a clean odd-one-out decision point.

Given Data / Assumptions:

• Guitar → strings.
• Violin → strings.
• Veena → strings (Indian plucked lute family).
• Flute → wind instrument.

Concept / Approach:
Group by sound-production mechanism: vibrating strings versus vibrating air. The unique wind instrument is the outlier among three string instruments.

Step-by-Step Solution:

Verification / Alternative check:
Ask whether the instrument uses a bow/plectrum/finger plucking (strings) or breath (wind). Only the flute requires breath.

Why Other Options Are Wrong:

Common Pitfalls:
None; this is a textbook family-based classification.

Final Answer:
Flute