State any three situation in which govt. comapnyis the best suitable form of public sector organisation?

The answer to your question is already covered in our revision notes of Business Studies XI. Follow the given link and scroll down to the topic 'Government company - suitability' to view the same.

https://www.meritnation.com/cbse/class11-commerce/revision-notes/business-studies/business-studies/private-public-and-global-enterprises/1161_5366