Which of these is a Russian triangular musical instrument?

Let me hear your balalaika ringing out come and keep your comrade warm. I’m back in the USSR.

Hey...If I'm not mistaken...that showed up in "Doctor Zhivago"!!

My husband used to play the balalaika in a group called Triangle, and we have two of his old instruments hanging up in our living room.

Day in the night Taking places in the train to Moscow Now I'm coming back to drink some iced vodka Landscape in white Sun is shining through the icicles I'm dancing in the snow to balalaika

I remember the actors Yul Brynner playing the Bala)Alka in T areas Bulba.

I brought one home from Russia, but then gave it to a guy I knew who loved it and could immediately make beautiful music on it