Filing "married filing jointly" for non-resident alien spouse
I came to US on an L1 visa in 2012 (from India) and completed 183 days of continuous stay in US. Hence, I can be termed as a Resident Alien. But my wife and daughter came to the US in Oct 2012, and they would not be considered Resident Aliens (as their stay in US for 2012 is less than 183 days).
My questions are:
1) Can I file in 2013 "married filing jointly" even if my wife is non-resident alien ?
2) Logically my number of allowances are 4 (with non working spouse, dependent kid ,having 1 job and nobody else claiming me as dependent). Does it contradict with the fact that I am SINGLE as per W4 as my wife and kid are NRA (not completing 183 days in current year)?
Kindly advise...
Biswadeep