Concept:
This is a coding-decoding problem based on reverse alphabet (complementary letters) and positional shifting.
Step 1:Analyze the given coding.
\[
\text{BE QUICK} \rightarrow \text{ZC OSGAI}
\]
Break it:
\[
B \rightarrow Z,\quad E \rightarrow C
\]
\[
Q \rightarrow O,\quad U \rightarrow S,\quad I \rightarrow G,\quad C \rightarrow A,\quad K \rightarrow I
\]
This follows the rule:
\[
\text{Each letter is shifted } (-2) \text{ positions in alphabet}
\]
Step 2:Identify the required word.
Sentence:
\[
\text{I LOVE MY COUNTRY}
\]
Third word = MY
Last letter = Y
Step 3:Apply coding rule:
\[
Y \rightarrow W \quad (\text{2 letters backward})
\]
Step 4:Final Answer:
\[
\text{W}
\]