If your PDF’s answer key says (a) or any other, the key is wrong.
As Lok Vyavhar is a TV show, there isn't a direct PDF version available. However, if you're looking for a downloadable guide or a summary of the show, here are a few possible resources:
Check the file size: A genuine fixed PDF should be between (high quality). Files under 5 MB are likely compressed, blurry, or incomplete.