The official residence cum office of the President of Bangladesh, located in Dhaka, is popularly known by which of the following names?

Introduction / Context:
Many exams test general knowledge about the official residences of heads of state, such as Rashtrapati Bhavan in India, White House in the United States, and similar buildings in other countries. These places are not only homes but also important symbols of national authority and host official ceremonies. This question asks you to recognise the official residence cum office of the President of Bangladesh in its capital city, Dhaka.

Given Data / Assumptions:

• The location is Dhaka, the capital of Bangladesh.
• The building is the residence and office of the President of Bangladesh.
• The options include Dhaka House, Sonar Bangla, Bangabhaban, and No option is correct.
• We assume familiarity with major national buildings in neighbouring countries.

Concept / Approach:
The official residence and principal workplace of the President of Bangladesh is called Bangabhaban. The name combines Bangla words related to the nation and a grand building. It is similar in status to Rashtrapati Bhavan in India. Sonar Bangla is a phrase meaning Golden Bengal and is used in patriotic contexts, including the national anthem, not specifically for the presidential residence. Dhaka House is not the official name, and the inclusion of a No option is correct choice tests whether you really know the proper term Bangabhaban.

Step-by-Step Solution:
Step 1: Identify the building described as the residence cum office of the President of Bangladesh in Dhaka. Step 2: Recall that the official name of this building is Bangabhaban, a well known landmark in the country. Step 3: Compare this with the given options to see which one matches exactly. Step 4: Notice that Dhaka House is a generic sounding phrase without official recognition. Step 5: Recognise that Sonar Bangla refers to the idea of Golden Bengal and not to the presidential residence, so the correct answer must be Bangabhaban.

Verification / Alternative check:
To cross check, think of how exam books usually list official residences. They pair Rashtrapati Bhavan with India, Bangabhaban with Bangladesh, and Sri Lanka has its own presidential house. Bangabhaban is specifically associated with the President of Bangladesh and frequently appears in news reports when new presidents take oath or when foreign dignitaries visit. The consistent usage of this term in media and educational material confirms that it is the correct name of the residence in question.

Why Other Options Are Wrong:
Dhaka House is wrong because it is not an official name but only a descriptive sounding phrase. Sonar Bangla is incorrect because it is a poetic term for Golden Bengal and is mainly associated with the national anthem and patriotic songs, not with a physical building. No option is correct is also wrong because there is in fact a correct name in the list, namely Bangabhaban. Therefore, only Bangabhaban matches both the description and the recognised official terminology.

Common Pitfalls:
Students sometimes choose Sonar Bangla because they associate it with Bangladesh and think the question is only about a famous phrase. Others may be tempted by Dhaka House since it has the capital city name, but official buildings usually have more distinct names rather than simple city house phrases. The presence of a No option is correct alternative can also cause overthinking. The safest strategy is to remember well known pairs of presidents and their official residences in different countries, which eliminates guesswork and provides safe, direct recall in such questions.

Final Answer:
The correct answer is Bangabhaban, which is the official residence cum office of the President of Bangladesh in Dhaka.