The king who successfully defended Manipur against Burmese invasions in the early 18th century was:

Garib Niwaz (Pamheiba)
Ching-Thang Khomba
Khagemba
Bhagyachandra

The correct answer is: a) Garib Niwaz (Pamheiba).

Garib Niwaz (Pamheiba) was the king of Manipur from 1709 to 1748. He is best known for his successful defense of Manipur against Burmese invasions in the early 18th century.

Garib Niwaz was born in 1672 to a royal family. He ascended to the throne in 1709 after the death of his father, Meidingu Khagemba. Garib Niwaz was a skilled military leader and he quickly set about strengthening the Manipuri army. He also built a number of forts and fortifications to protect the kingdom from attack.

In 1724, the Burmese invaded Manipur. Garib Niwaz led the Manipuri army to victory against the Burmese. He was able to repel the Burmese invasion and secure the borders of Manipur.

Garib Niwaz was a popular king and he is remembered as a great military leader and a defender of Manipur. He died in 1748 at the age of 76.

Option b), Ching-Thang Khomba, was the king of Manipur from 1697 to 1709. He was the father of Garib Niwaz.

Option c), Khagemba, was the king of Manipur from 1642 to 1652. He was the grandfather of Garib Niwaz.

Option d), Bhagyachandra, was the king of Manipur from 1750 to 1762. He was the son of Garib Niwaz.