Step 1: Understanding the role of various educational bodies.
The National Council of Educational Research and Training (N.C.E.R.T) works at the national level.
The State Council of Educational Research and Training (S.C.E.R.T) works at the state level for planning, implementation, and evaluation of educational programs.
Step 2: Analyzing the options.
Option (A):
Incorrect. N.C.E.R.T. operates at the national level.
Option (B):
Correct. S.C.E.R.T. is responsible for planning and implementing educational programs at the state level.
Option (C):
Incorrect. D.I.E.T. is primarily involved with teacher training and development at the district level.
Option (D):
Incorrect. C.B.S.E. is the national board for secondary and higher secondary education.