I came across this question in the Q Bank for NS and was confused.. Can't you use specific gravity for any fluid? Not just relative to water's density?

My thought process was that since specific gravity is a term relative to the fluid a specific gravity greater than one means the density of the object is greater than the fluid it is in.. and it will therefore sink (sink SG = density object/density fluid).

I will attach the photos of the question and explanation. Let me know if I am wrong in my logic!

My thought process was that since specific gravity is a term relative to the fluid a specific gravity greater than one means the density of the object is greater than the fluid it is in.. and it will therefore sink (sink SG = density object/density fluid).

I will attach the photos of the question and explanation. Let me know if I am wrong in my logic!