I think The Reason Dimpy and Sonali got nominated is Gautam.

I couldn't get why Pritam and Puneet would nominate Sonali over Diandra. It seems the game has started Dimpy supported Gautam openly for captain and Sonali didn't let reelection happen this maybe the actual reason they are nominated. Pritam and Puneet are getting scared about Gautam popularity and don't want any support for him inside while Dimpy is in your face kind of support for gautam Sonali tends to be by his side from time to time. I believe Pritam couldn't take that he couldn't be the captain and now he is trying to target ppl who even slightly support gautam I won't be surprised if he votes for gautam and Puneet next.