Topic: verb (ক্রিয়া),

Best Answer Explained in Below-:

The question contrasts the concepts of discovery and invention, highlighting their distinct meanings. The phrase "To discover is --- about something that already exists" implies that discovery involves gaining knowledge about something that is already present in the world but may not have been recognized or understood before. The best fit for this blank is "to learn," as discovery is fundamentally about acquiring knowledge or understanding things that were previously unknown or overlooked.

In contrast, the second part of the statement, "to invent is ---- something new," clearly denotes the act of creating. Invention involves bringing something into existence that did not previously exist, which aligns perfectly with the term "to create." Invention is an active process of generating ideas that result in new products, processes, or concepts.

Therefore, the correct choice is "C: to learn, to create." This option accurately reflects that discovery is centered on acquiring knowledge about existing entities, while invention focuses on the creation of new ideas or tangible items.