Step 1:
Pandu was the father of Arjuna.
Step 2:
Arjuna was the father of Abhimanyu.
Step 3:
Abhimanyu’s son was Parīkşita, and Parīkşita’s son was Janamejaya.
Step 4:
Thus, the genealogy is:
\[
C \rightarrow A \rightarrow B \rightarrow D \rightarrow E
\]
Hence, the correct answer is:
\[
\boxed{\text{(1)}}
\]