To solve this problem, we need to understand the structure of phloem in gymnosperms.$\newline$Phloem is a type of vascular tissue responsible for the transport of nutrients in plants.$\newline$In angiosperms, phloem typically consists of:$\newline \bullet$Sieve tubes$\newline \bullet$Companion cells$\newline \bullet$Phloem fibers$\newline \bullet$Phloem parenchyma$\newline$However, in gymnosperms, the phloem structure is different:$\newline \bullet$Gymnosperms lack sieve tubes and companion cells.$\newline \bullet$Instead, they have sieve cells and albuminous cells.$\newline$Let's analyze the options:$\newline \bullet$Option 1: Albuminous cells and sieve cells - Gymnosperms have these cells, so this option is incorrect.$\newline \bullet$Option 2: Sieve tubes only - Gymnosperms lack sieve tubes, but this option does not mention companion cells.$\newline \bullet$Option 3: Companion cells only - Gymnosperms lack companion cells, but this option does not mention sieve tubes.$\newline \bullet$Option 4: Both sieve tubes and companion cells - Gymnosperms lack both of these, making this option correct.$\newline$Therefore, the correct answer is Option 4: Both sieve tubes and companion cells.