Directions: In following question, four statement are provided between an opening statement 1 and closing statement 6. The four statements are jumbled up and form a coherent paragraph when properly arranged. Select the alternative representing the proper and logical sequencing of these six taken together.

1. The Government of India has mounted a major technology demonstration project for fly ash utilization. A. The construction of four dwelling units at the abandoned fly ash pond of the National Fertilizers Ltd. (NFL) at Panipat has been successful, and they have been tested through a monsoon season.
   B. In many parts of India, there are successful examples of the use of fly ash, first being Okhla Flyover bridge which is operating successfully. C. The results indicate that a structure up to four storey height can be safely and economically erected at abandoned ash ponds.
   D. This mission mode project was the result of earlier work by TIFAC and is now being implemented by it along with many national and state government agencies as well as industries and institutions.
2. However, initial testing of the site is required as it is usually done for regular soils as well.