Written in Austria in 1762, the composer of Symphony No. 5 was a brilliant musician, Franz Joseph Haydn, who many later called the "Father of the Symphony" for his contribution to classical music while court musician for the Esterhazy family.
A) the composer of Symphony No. 5 was a brilliant musician, Franz Joseph Haydn, who many later called the "Father of the Symphony" for his
B) Franz Joseph Haydn's Symphony No. 5, who many later called the "Father of the Symphony" for his
C) Symphony No. 5 was composed by a brilliant musician, Franz Joseph Haydn, who many later called the "Father of the Symphony" for his
D) Symphony No. 5's composer was a brilliant musician, Franz Joseph Haydn, whom many later called the "Father of the Symphony" for his
E) Symphony No. 5 was composed by a brilliant musician, Franz Joseph Haydn, whom many later called the "Father of the Symphony" for his

how to make sure whether its who or whom

who when the noun is the subject and whom when the noun is an object

in the sentence above, Franz Joseph Haydn is the object and therefore whom is used

thanks for the tip

what is the OA ? Is is it E ?

lagomez's explanation is right. I think it should be E, bc it uses the modifier (Symphony No. 5 was composed by a brilliant musician) and whom correctly.

I completely agree that the OA for the given Q is E. Although some sources demonstrate that there isn't, in modern English, the difference between WHO and WHOM and that they are used equally.
Haha. This question is interesting.

OA Is

IMO E

A) the composer of Symphony No. 5 was a brilliant musician, Franz Joseph Haydn, who many later called the "Father of the Symphony" for his - misplaced modifier
B) Franz Joseph Haydn's Symphony No. 5, who many later called the "Father of the Symphony" for his - whom needed
C) Symphony No. 5 was composed by a brilliant musician, Franz Joseph Haydn, who many later called the "Father of the Symphony" for his - whom needed
D) Symphony No. 5's composer was a brilliant musician, Franz Joseph Haydn, whom many later called the "Father of the Symphony" for his - misplaced modifier
E) Symphony No. 5 was composed by a brilliant musician, Franz Joseph Haydn, whom many later called the "Father of the Symphony" for his - CORRECT

who would be like
....john, who was xxxxx

Kudos to Lagomez and LevFin7S !

Yep, pronoun who is used in subjective case and whom is objective case; Similarly with whoever & whomever.

I came up with E as well. But you guys gave some great explanations.

The answer is E because first between who and whom, you have to choose whom because you can replace it by him
eg. many called him vs many called he vs he called .... --> so clearly we have to choose whom over who
so you can eliminate A, B, C
Then the symphony modify "written in Austria in 1762", and not the composer, so there is no confusion, the answer is E

To make sure between who and whom, you have to replace who by he and whom by him, however sometimes you have to rearrange the sentence to replace, then find which one sound better

E; although must admit C made a lot of sense too... till whom won over who
my rule of thumb for who is third person reference; like the subject\object reference in the notes above.
Good One...!

I learned from a PowerPrep class to subsitute out and see if it would be better with "he" or "him". If it makes sense with "him", use "whom". If the sentenece makes sense with "he", use "who."

Whom - because it is object of called ?

IMO E.

I understand that the whom should be used in this case but what if this sentence was modified a bit to

Written in Austria in 1762, the composer of Symphony No. 5 was a brilliant musician, Franz Joseph Haydn, who/whom many later called was later called the "Father of the Symphony" for his contribution to classical music while court musician for the Esterhazy family.

IMO the answer should be "who" now.

Can anyone confirm this?