Question

Hydrophytes completely submerged in water and not rooted in the mud are

• A. Hydrilla and Vallisneria
• B. Utricularia and Hydrilla
• C. Typha and Salvinia
• D. Nymphaea and Lemna

Hint:

Examples of hydrophytes: \[ \boxed{ \begin{aligned} &\text{Rooted submerged} &&\rightarrow \textit{Vallisneria} &\text{Submerged free} &&\rightarrow \textit{Hydrilla,\ Utricularia} &\text{Free floating} &&\rightarrow \textit{Lemna,\ Salvinia} &\text{Rooted floating} &&\rightarrow \textit{Nymphaea} \end{aligned} } \]

Answer 1

The Correct Option is B

Step 1: Recall types of hydrophytes. Hydrophytes that remain completely submerged and are free from rooting in mud are called submerged free-floating hydrophytes. Examples include \[ \boxed{\textit{Utricularia} \text{ and } \textit{Hydrilla}.} \]

Step 2: Eliminate other options. \[ \begin{aligned} \textit{Vallisneria} &\rightarrow \text{Rooted submerged hydrophyte} \textit{Typha} &\rightarrow \text{Marsh plant} \textit{Salvinia} &\rightarrow \text{Free-floating hydrophyte} \textit{Nymphaea} &\rightarrow \text{Rooted floating-leaved hydrophyte} \textit{Lemna} &\rightarrow \text{Free-floating hydrophyte} \end{aligned} \] Thus, only option (B) satisfies the condition.

Step 3: Choose the correct option. Hence, \[ \boxed{(B)} \] is the correct answer.