Concept:
Musicians are categorized based on their specialization in specific classical instruments. Identifying prominent historical and modern exponents of the double-headed barrel drum (Pakhawaj) separates them from stringed or vocal maestros.
Step 1: Evaluate each artist by their specialized instrument.
Let us review the instrument specializations for the given options:
• A. Pandit Gaurishankar: Associated with Carnatic classical percussion or specialized instrumentation.
• B. Pandit Parvat Singh: A legendary historical virtuoso of the Pakhawaj who belonged to the esteemed Kudau Singh lineage.
• C. Pandit Lalmani Mishra: A world-renowned instrumentalist celebrated for his mastery over the stringed *Vichitra Veena*.
• D. Pandit Ramshankar Das (popularly known as Pagaldasji of Ayodhya): One of the most famous 20th-century exponents and composers of the Pakhawaj.
Step 2: Select the correct pair.
Since Pandit Parvat Singh (B) and Pandit Ramshankar Das (D) are both iconic masters of the Pakhawaj instrument, the correct combination is "B and D Only," matching option (2).