Concept:
PARAKH stands for Performance Assessment, Review and Analysis of Knowledge for Holistic Development. It is India's National Assessment Centre established by NCERT in accordance with the National Education Policy (NEP) 2020.
• PARAKH is a national assessment centre under NCERT.
• It aims to standardize student assessment across the country.
• It promotes competency-based learning and assessment.
Step 1: Understand the purpose of PARAKH.
PARAKH was established to:
\[
\boxed{\text{Improve the quality and uniformity of student assessment in India.}}
\]
It develops guidelines, benchmarks and standards for evaluating students' learning outcomes.
Step 2: Compare the other options.
• Diksha -- Digital platform for teachers and students.
• Parakh -- National Assessment Centre (Correct).
• Nishtha -- Teacher training programme.
• Vidyanjali -- Community participation in school education.
Step 3: Identify the correct expansion.
PARAKH expands to:
\[
\boxed{\text{Performance Assessment, Review and Analysis of Knowledge for Holistic Development}}
\]
Step 4: Final conclusion.
Hence, the correct answer is:
\[
\boxed{\text{Parakh}}
\]