Choose the bilabial consonants :

Question

Accepted Answer

Bilabial consonants are sounds produced by bringing both lips together. In phonetics, these sounds are characterized by the use of both lips as the primary articulators. Let's examine the options provided:

1. **/ p b /**: This option is correct because both /p/ and /b/ are bilabial consonants. The sound /p/ is a voiceless bilabial plosive, and /b/ is a voiced bilabial plosive. In both cases, the lips come together to block the airflow and then release it, which is the defining characteristic of bilabial sounds.

2. **/ t d /**: This option is incorrect because /t/ and /d/ are alveolar consonants, not bilabial. These sounds are produced by placing the tongue against the alveolar ridge, which is located just behind the upper front teeth, rather than using the lips.

3. **/ t ∫ /**: This option is incorrect because /t/ is an alveolar consonant, as explained above, and /∫/ (sh as in "shoe") is a postalveolar fricative. The sound /∫/ is produced by placing the tongue near the roof of the mouth, not by using the lips.

4. **/ k g /**: This option is incorrect because /k/ and /g/ are velar consonants. These sounds are produced by the back of the tongue making contact with the soft palate (velum), rather than using the lips.

In summary, Option 1 is the correct choice because it includes the bilabial consonants /p/ and /b/, which are produced by bringing both lips together. The other options involve different articulatory mechanisms that do not utilize the lips as the primary articulators.