Which definition best describes 'internal'?

• A. Found or existing within certain limits.
• B. Inner.
• C. Interior.
• D. External.

Answer: (B)

Internal means located inside or within the boundaries of something. The best fit is inner, because it directly expresses being on the inside or the inside part of something. Interior is related and refers to the inside space itself, but inner captures the notion of location or relation inside more precisely. The idea of something being “found or existing within certain limits” is about being inside a boundary, but it’s a broader phrasing that doesn’t pin down the inside position as cleanly as inner. External is simply the opposite. For example, internal organs are the inner parts of the body, and internal motivations are those from within.