Which is considered as oldest religion and still practiced?

Answer 1

Hinduism , Judaism and Zoroastrianism are about 5000 + years old and are still being practiced today.

Hinduism is generally considered to be the oldest religion still being practiced today. Although it has had many changes throughout the centuries.
Zoroastrianism is sometimes called the world's oldest prophetic religion. It's certainly one of the earliest religions founded by one person.