Bihar Polls: Why Nitish Kumar's photo is missing from BJP's posters?

Campaigning for the first phase of Bihar Assembly elections is slated to end on Monday evening.
Watch the visuals from Bihar, where BJP has put up new posters in the state.
Chief Minister Nitish Kumar's face is missing from these posters. 
It only has face of Prime Minister Narendra Modi. Stay connected for more updates on Bihar polls.