Topic: Adjective (বিশেষণ),

Best Answer Explained in Below-:

The correct answer is C) lunar, as it is the adjective form of the noun "moon." The term "lunar" derives from the Latin word "luna," which specifically means "moon." In scientific and astronomical contexts, "lunar" is commonly used to describe anything that is related to or characteristic of the moon. For instance, we have terms like "lunar surface," which refers to the physical features of the moon, or "lunar phases," describing the various stages of the moon’s visibility from Earth.

In contrast, the other options do not serve as adjectives related to the moon. A) "linear" pertains to lines or a straight progression, B) "loner" describes someone who prefers solitude, and D) "lunatic," although it historically referred to someone affected by the phases of the moon, is now considered outdated and derogatory for describing individuals with mental illness. Thus, "lunar" is the only appropriate adjective associated with the concept of the moon, making it the correct choice.