Formal:
* Tere chote bhai da ki haal hai? (तेरे छोटे भाई दा की हाल है?) - This is a formal way to ask, suitable for someone you don't know well.
* Tere chote bhai nu kaise hain? (तेरे छोटे भाई नू कैसे हैं?) - Another formal option.
Informal:
* Tere chote bhai kivein ne? (तेरे छोटे भाई कीवेन ने?) - This is a more casual way to ask, suitable for friends and family.
* Tere chote bhai kaise han? (तेरे छोटे भाई कैसे हन?) - Another informal option.
* Tere chote bhai da kya haal hai? (तेरे छोटे भाई दा क्या हाल है?) - Similar to the first formal option but more casual.
More specific:
* Tere chote bhai kaise han, padhai ch? (तेरे छोटे भाई कैसे हन, पढ़ाई च?) - "How is your little brother, in studies?"
* Tere chote bhai nu kya kar rahe ne? (तेरे छोटे भाई नू क्या कर रहे ने?) - "What is your little brother doing?"
Note:
* The word "chhote" (छोटे) can be replaced with "chhota" (छोटा) depending on the region and dialect.
* The word "bhai" (भाई) can be replaced with "veer" (वीर) which is another word for brother.
* The word "nu" (नू) is used for "to" in Punjabi.
Choose the option that best suits the situation and your relationship with the person you are talking to.