To solve this problem, we need to analyze the given statements:$\newline$Assertion (A): A flower is defined as a modified shoot wherein the shoot apical meristem changes to floral meristem.$\newline$Reason (R): Internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves.$\newline$Let's break down each statement:$\newline \bullet$Assertion (A):$\newline$ - A flower is indeed a modified shoot.$\newline$ - The shoot apical meristem transforms into a floral meristem, which is responsible for the development of floral organs.$\newline$ - Hence, Assertion (A) is correct.$\newline \bullet$Reason (R):$\newline$ - In the process of flower formation, the internodes of the shoot are typically condensed.$\newline$ - This condensation allows for the lateral production of floral appendages (such as sepals, petals, stamens, and carpels) at successive nodes.$\newline$ - Hence, Reason (R) is correct.$\newline$Now, let's determine if (R) is the correct explanation of (A):$\newline \bullet$The reason explains the structural changes that occur during the transformation of a shoot into a flower.$\newline \bullet$It highlights the condensation of internodes and the lateral development of floral parts, which are key aspects of floral meristem development.$\newline$Therefore, (R) is indeed the correct explanation of (A).$\newline$Thus, the most appropriate answer is Option 1: Both (A) and (R) are true and (R) is the correct explanation of (A).