1. Melody
And the one the starts with OR is orchestra and the one that starts with TR is trumpet abs the one that starts with CON is conductor and I’m guessing the one that start with M and has a S and C is Music
The most often used application of the term virtuosity applies to music - a virtuosic piece, a virtuosic musician etc. Thus the answer to this is b. Virtuosity means extreme technical proficiency in an area of music (though it can be applied to other things as well to show mastery of a skill - a virtuosic painter etc.)
Why are you using English, something and arabic???