Choose the word which is different from the rest.

The answer is D. Guitar.

A veena is a stringed instrument of the lute family, used in Indian classical music. It has a long, fretted neck and a gourd-shaped body. The sitar is a stringed instrument of the lute family, used in Indian classical music. It has a long, fretted neck and a large, pear-shaped body. The drum is a percussion instrument that is played by striking it with the hands or with sticks. The guitar is a stringed instrument that is played by plucking the strings with the fingers.

The guitar is the only instrument in the list that is not a traditional Indian instrument. It is a Western instrument that has been adopted by Indian musicians in recent years.