Step 1: Place the 11th Plan in sequence.
10th Plan: 2002--2007 \quad $\Rightarrow$ \quad 11th Plan: follows next.
Step 2: State the official window.
The Eleventh Five-Year Plan of India ran from 2007 to 2012.
Step 3: Eliminate options.
(A) and (B) are earlier; (D) is the Twelfth Plan period; only (C) matches.
Step 4: Conclusion.
Therefore, (C) 2007--2012.