Caretaker PM — ECP selects Khoso for the job

Re: Caretaker PM — Asma Jahangir or Hussain Haroon?

Yes according to the 17th amendment after the completion of the term of the assembly a care taker government needs to be installed, and as per 18th amendment the caretaker should be nominated by the outgoing prime minister after consultation with the opposition leader.

http://millat.com/democracy/Elections/978-969-558-022-6.PDF