Kindly help in filling the form....it is said that No field should be left blank.

Personal Info: there is a field Rank/status then Service No. then Regt/corps/branch/department. what is this all about and what should be written there? Then there is a field
Build______ what is this?

Then after Domicile field it is written If naturalised, state _____ what is this? what is naturalised?

Then in passport detail what should be written in fields
Type of passport? Issuing authorities? countries for which valid?

Then point 31:
Date of joining present service____
Date of commission_____
Date of promotion to present rank_____
What should be written there?