To solve this problem, we need to analyze the given statements:$\newline$Assertion (A): The first stage of gametophyte in the life cycle of moss is the protonema stage.$\newline$Reason (R): Protonema develops directly from spores produced in capsule.$\newline$Let's break down each statement:$\newline \bullet$Assertion (A):$\newline$ - In the life cycle of mosses, the gametophyte is the dominant phase.$\newline$ - The first stage of the gametophyte is indeed the protonema stage, which is a thread-like chain of cells.$\newline$ - Hence, Assertion (A) is correct.$\newline \bullet$Reason (R):$\newline$ - The protonema develops directly from the spores that are produced in the capsule of the moss sporophyte.$\newline$ - This is a true statement as the spores germinate to form the protonema.$\newline$ - Hence, Reason (R) is correct.$\newline$Now, let's determine if (R) is the correct explanation of (A):$\newline \bullet$The reason explains the origin of the protonema stage, which is the first stage of the gametophyte.$\newline \bullet$It directly connects the development of the protonema from spores, supporting the assertion.$\newline$Therefore, (R) is indeed the correct explanation of (A).$\newline$Thus, the most appropriate answer is Option 1: Both (A) and (R) are correct and (R) is the correct explanation of (A).