CPC Trap: Summons to be served on whom?

Suno brothers, don't get misled by simple questions. I saw this in AILET and people still got it wrong. Q: In a suit for partition of property, summons is to be served on whom? Most people will say the 'defendant', but wait, read on. It's actually the 'party to the suit'. Yes, you read that right. According to Order 5 Rule 9 of CPC, summons in a suit for partition shall be issued and served on all parties to the suit, whether they are plaintiffs or defendants. The reason is simple, partition involves the rights of all co-owners in the property, so all parties must be served. Don't make the mistake, serve on the 'party to the suit', not just the 'defendant'.