Correct Answer - Option 1 : Kathir
1) Kathir is a senior of Ganesh.
2) Ganesh is a senior to Apparu.
⇒ Kathir > Ganesh > Apparu
3) Apparu is a junior of Raju.
4) Raju is a junior of Ganesh.
⇒ Kathir > Ganesh > Raju > Apparu
Clearly, Kathir is the senior-most person.