Take full resolution picture on lumia 535 front!

[akash das4]

I'm using a lumia 535 which has 5MP front facing shooter. It takes photo well. But when I open the file manger & and check the photo details, it shows the photo resolution is 4MP!!!!!!!!!!! That means it actually shoots in 16:9 ratio, but I cant take photo in 4:3 ratio.... Mind it, I'm using the default 'lumia selfie' app & there's no option to change photo resolution...... I'm using Metro File manager which is more useful..... Is it possible to take selfie in 4:3 ratio in my device? Need your suggestion!!!!!!!