English grammar error-spotting (comparatives with ‘‘senior/junior/superior/inferior’’ take ‘‘to’’, not ‘‘than’’): Identify the erroneous part among A–D; choose ‘‘No error’’ only if all parts are correct. Mind the comparative preposition and pronoun case: ‘‘She is / five years / senior than me. / No error.’’

Given data

• A: ‘‘She is’’
• B: ‘‘five years’’ (extent of comparison)
• C: ‘‘senior than me.’’
• D: ‘‘No error.’’

Concept / Approach
The adjectives senior, junior, superior, inferior, prior, posterior etc. do not use ‘‘than’’; they take the preposition ‘‘to’’ (e.g., ‘‘senior to’’). The pronoun after the preposition may be objective (‘‘me’’) or a possessive construction (‘‘than I am’’ in other comparative types).

Step-by-step correction
Replace Part C with: ‘‘senior to me.’’ The measure phrase ‘‘five years’’ remains correctly placed between the verb and the comparative adjective.

Verification
‘‘She is five years senior to me.’’ is the standard idiom.

Common pitfalls

• Writing ‘‘senior than’’ by analogy with regular comparatives.
• Omitting the measure phrase or misplacing it.

Final Answer
senior than me.