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.

Comprehension:
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.