Golden Temple, also known as Sri Harmandir Sahib, is the largest and oldest Gurdwara of India. It is located in the city of Amritsar, Punjab and is considered to be the holiest shrine of Sikhism. Here are some details about Golden Temple:

History:
- Golden Temple was built in the 16th century by the fourth Sikh guru, Guru Ram Das.
- The temple was later developed and expanded by his successor, Guru Arjan Dev.
- The temple was attacked several times by foreign invaders and was also damaged in the Operation Blue Star in 1984.

Architecture:
- The temple is surrounded by a holy lake called Amrit Sarovar, which is believed to have healing powers.
- The temple is made of white marble and is adorned with gold and precious stones, giving it the name Golden Temple.
- The temple has four entrances, symbolizing the openness of Sikhism towards all people and religions.

Significance:
- The temple is a symbol of equality, as people of all castes, religions and nationalities are welcome to visit and pray.
- The temple serves langar, a free communal meal, to thousands of visitors every day.
- The temple is also known for its Akhand Path, a continuous recitation of the Sikh holy book, Guru Granth Sahib.

Conclusion:
As the largest and oldest Gurdwara of India, Golden Temple holds immense spiritual and cultural significance for the Sikh community as well as people from all over the world who visit it for its beauty and serenity.

I think A is the correct answer..
Golden temple is the largest Gurudwara but oldest is
'Katarpur ' Gurudwara located in same state Punjab..