Question

1. what form did haydn use in string quartet no. 15 in b - flat major, op. 9, no. 5, hob.iii:23: \ii. menuet: allegretto\?

binary form
melodic form
ternary form
strophic form

Explanation:

In the "II. Menuet: Allegretto" of Haydn's String Quartet no. 15 in B - flat Major, op. 9, no. 5, HOB.III:23, he used the ternary form. Ternary form is a musical form consisting of three sections (A - B - A). Menuets often follow this form. Binary form has two sections, melodic form is not a standard musical form in this context, and strophic form is more common in songs with repeated verses.

Answer:

C. ternary form