Which of the following features is characteristic of Treacher Collins syndrome?

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Palpebral fissures that slope upwardsUnderdeveloped or missing cheekbones (malar bones)Prominent lower jaw and protruding chinHearing remains unaffected

Explanation

Treacher Collins syndrome is primarily marked by hypoplasia or absence of the malar bones, leading to facial abnormalities. Upward slanting of the palpebral fissures, mandibular prognathism, and preserved hearing are not typical features of this condition.