In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

The initial two Russian PWR types at the Kudankulam site (1) ________ apart from India's three-stage plan (2) ________ nuclear power and were simply to increase generating capacity (3) ________ rapidly. Now there are (4) ________ for eight 1000 MWe units at that site, and in January 2007 a memorandum of understanding was (5) ________ for Russia.