Official NTA Answer Key & Analysis:
Official Answer Key: Option 2 (Multiprocessing) is marked in the official NTA answer key.
Technical & Academic Clarification: In formal operating system taxonomy, running multiple programs concurrently on a single CPU by interleaving execution is termed Multiprogramming (or multitasking/time-sharing), whereas Multiprocessing strictly denotes systems utilizing two or more physical CPUs. However, following the official NTA answer key for this question, Option 2 is the official answer.

Analysis of bioinformatics versus wet-lab techniques:

• Incorrect (Is a tool): BLAST is a widely used heuristic sequence alignment search program.
• Incorrect (Is a tool): ClustalW is a standard bioinformatics tool for multiple sequence alignment.
• Correct (Not a tool): PCR (Polymerase Chain Reaction) is an in vitro wet-laboratory molecular biology technique used to amplify specific DNA fragments enzymaticallly, not a computational bioinformatics software tool.
• Incorrect (Is a tool): PHYLIP (Phylogeny Inference Package) is a bioinformatics software package for inferring evolutionary trees.

Identification of DBMS software:

• MySQL is a widely used open-source relational DBMS.
• Microsoft Access is a desktop relational DBMS bundled with Microsoft Office.
• IBM DB2 is an enterprise-grade relational database management system developed by IBM.
• Google is a technology corporation and web search engine/cloud service provider, not a software DBMS product.

Database conceptual modeling concepts:

• Relation set refers to a collection of related tuples in a relational schema.
• Tuples represent individual rows or records in a relation.
• In ER modeling, an Entity set is formally defined as a collection of entities of the same type that share the same attributes (e.g., all employees in a company form the Employee entity set).
• Entity Relationship model is the overarching architectural framework.