The administrative capital or new federal administrative center of Malaysia is Putrajaya, which is option 3 in the given choices.

Putrajaya was established in 1995 and became the administrative capital of Malaysia in 1999, replacing Kuala Lumpur as the administrative center. It was purpose-built to serve as the federal administrative center and houses various government offices, ministries, and agencies.

Here are some detailed reasons supporting the choice of Putrajaya:

1. Purpose-built administrative capital: Putrajaya was specifically planned and constructed to serve as the administrative capital of Malaysia. The Malaysian government wanted to decentralize administrative functions from Kuala Lumpur and establish a new administrative hub that could accommodate the growing needs of the government.

2. Government offices and ministries: Putrajaya is home to numerous government offices and ministries. It houses the Prime Minister`s Office, various ministries, government agencies, and departments. The presence of these institutions demonstrates its importance as the administrative center of Malaysia.

3. Iconic landmarks: Putrajaya is known for its impressive architectural landmarks, which symbolize the country`s administrative power. Notable landmarks include the Putra Mosque, Perdana Putra (Prime Minister`s Office Complex), Putrajaya International Convention Centre, and Putrajaya Palace of Justice.

4. Administrative functions and events: Putrajaya hosts important administrative functions and events, including cabinet meetings, diplomatic conferences, and official ceremonies. The city`s infrastructure and facilities are designed to cater to these administrative activities.

5. Transportation and connectivity: Putrajaya is well-connected to the rest of Malaysia through an efficient transportation network. It has its own dedicated expressway, the Putrajaya-Cyberjaya Expressway, which links it to Kuala Lumpur and other major cities. The presence of the Putrajaya Sentral transportation hub further enhances connectivity.

It is important to note that while Kota Bharu, Kuala Terengganu, and Taiping are significant cities in Malaysia, they do not serve as the country`s administrative capital or new federal administrative center. Kota Bharu is the capital of the state of Kelantan, Kuala Terengganu is the capital of Terengganu, and Taiping is a historical town in Perak. These cities have their own administrative roles within their respective states but do not hold the same administrative significance as Putrajaya.

In conclusion, Putrajaya is the correct answer as it serves as the administrative capital and new federal administrative center of Malaysia, housing government offices, ministries, and important administrative functions.