Allomorph are different forms of the same morpheme.

• A. Different forms of the same morpheme
• B. Different languages
• C. Different parts of speech
• D. Different syllables

Answer: (A)

Allomorphs are different surface realizations of the same morpheme. A morpheme is the smallest unit of meaning, and sometimes that unit can be heard or pronounced in more than one way while keeping the same meaning. Take the plural marker in English: it represents the same grammatical idea of plural, but it has three common pronunciations: [s], [z], and [ɪz]. So you hear cats with a final [s], dogs with a final [z], and horses with an [ɪz] ending. Each pronunciation is an allomorph of the same plural morpheme, conditioned by the preceding sound for ease of pronunciation.

These variants are about phonology, not different meanings, languages, parts of speech, or distinct syllables in isolation. They stay within one language and serve the same grammatical function, just realized differently in speech.