Which of the following musical instruments is also known as a 'Mangal Vadya'?

Shehnai

The correct answer is Option (1) - Shehnai

The musical instrument that is also known as a 'Mangal Vadya' is the Shehnai.

The Shehnai is a traditional Indian wind instrument, similar to a oboe, and is commonly played in Hindu and Sikh ceremonies, particularly during weddings and other auspicious occasions. It is often associated with bringing prosperity and auspiciousness, hence the name 'Mangal Vadya', where 'Mangal' refers to auspiciousness.