Concept:
The Renaissance period in Western music approximately covered:
\[
1400 \text{ to } 1600
\]
It emphasized:
• Polyphonic music,
• Choral compositions,
• Sacred church music,
• Musical harmony and balance.
To solve this question, we identify which composers belonged to the Renaissance era.
Step 1: Analyzing Guillaume Dufay.
Guillaume Dufay was an important early Renaissance composer.
He contributed greatly to:
• Sacred music,
• Polyphonic compositions,
• Early Renaissance musical structure.
Thus:
\[
A \text{ is correct}
\]
Step 2: Analyzing Giovanni Pierluigi.
Giovanni Pierluigi da Palestrina was one of the greatest Renaissance composers.
He became famous for:
• Church music,
• Mass compositions,
• Polyphonic choral music.
Hence:
\[
B \text{ is correct}
\]
Step 3: Analyzing Ludwig van Beethoven.
Beethoven belonged to:
\[
\text{Classical and Romantic period}
\]
which came much later than the Renaissance.
Thus:
\[
C \text{ is incorrect}
\]
Step 4: Analyzing Franz Schubert.
Franz Schubert belonged to the:
\[
\text{Romantic period}
\]
and not the Renaissance era.
Therefore:
\[
D \text{ is incorrect}
\]
Step 5: Selecting the correct combination.
The Renaissance composers are:
\[
A \text{ and } B
\]
Hence:
\[
\boxed{\text{Option (C)}}
\]