## **Core Concept**
The question revolves around the management of a child presenting with symptoms suggestive of adenoid hypertrophy and middle ear effusion, likely due to Eustachian tube dysfunction. The symptoms include recurrent respiratory tract infections, mouth breathing, and decreased hearing.

## **Why the Correct Answer is Right**
The child's symptoms—recurrent respiratory tract infections, mouth breathing, and decreased hearing—are classic for adenoid hypertrophy causing Eustachian tube obstruction, leading to middle ear effusion. **Adenoidectomy (b)** is often recommended for children with recurrent acute otitis media (ear infections) and significant adenoid hypertrophy causing nasal obstruction and Eustachian tube dysfunction. **Grommet (tympanostomy tube) insertion (c)** is directly addressing the middle ear effusion causing decreased hearing. The combination of adenoidectomy and grommet insertion is a common approach for managing such cases, especially when adenoid hypertrophy is believed to contribute to Eustachian tube dysfunction and recurrent middle ear problems.

## **Why Each Wrong Option is Incorrect**
- **Option A: Tonsillectomy** is primarily considered for recurrent tonsillitis, not directly addressing the Eustachian tube dysfunction or middle ear effusion.
- **Option D: Myringotomy** is a procedure that can temporarily relieve middle ear effusion but does not address the underlying cause of Eustachian tube dysfunction or adenoid hypertrophy. It is often done in conjunction with grommet insertion.
- **Option E: Myringoplasty** is a surgical procedure for repairing the tympanic membrane and is not indicated for the initial management of middle ear effusion or the symptoms described.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that adenoidectomy can significantly reduce the incidence of recurrent otitis media in children by alleviating adenoid hypertrophy-induced Eustachian tube obstruction. Additionally, the presence of middle ear effusion can lead to conductive hearing loss, emphasizing the importance of timely intervention like grommet insertion.

## **Correct Answer:** B.