DS-160 from: Sponsor's relationship with in-laws

[smits02]

Hi,
I am the sponsor and filling up the DS-160 form for my in-laws. But i am lil bit confused in selecting relationship status. there is
Person/Entity paying for your trip: I selected 'OTHER PERSON'
But then next question its asking details such as surnames, given names, telephone, email id and then "Relationship to You"
and options to choose from : CHILD, PARENT, SPOUSE, OTHER RELATIVE, FRIEND, OTHER.
So my question is which relationship i should select ?
CHILD or OTHER RELATIVE

Please help me in sorting this out! Its urgent, i wanna book an appointment for my in-laws.

Also can we provide 'PAN card' no as 'National Identification Number'?

[immihelp]

1. OTHER RELATIVE.

2. No.

Read http://www.immihelp.com/visas/ds-160-form/ for complete step by step guide.