The correct answer is: Both A and B are true, but R is not the correct explanation of A.
Damodar Valley Corporation (DVC) was established in 1948 to control floods, generate electricity, and promote irrigation and agriculture in the Damodar Valley region of India. The main thrusts of DVC are to provide irrigation and drinking water, generate electricity, and promote industrial development in the Damodar Valley region.
The assertion (A) is true. The reason (R) is also true, but it is not the correct explanation of A. The main thrusts of DVC are to provide irrigation and drinking water, generate electricity, and promote industrial development in the Damodar Valley region. Promotion of agriculture, public health, industrial, economic and general well-being in Damodar valley area are the means by which DVC achieves its main thrusts.