To solve the problem, we need to identify the element that is important in determining solute concentration and oxygen evolution.
1. Understanding the Question:
The question is asking for the element that plays a crucial role in processes related to solute concentration and oxygen evolution, which are key in biological and chemical systems, particularly in photosynthesis.
2. Analyzing the Elements:
Each option refers to an element that might have a role in these processes:
3. Conclusion:
Chlorine is the element most relevant to the question, as it is involved in both solute concentration regulation and the process of oxygen evolution in photosynthesis.
Final Answer:
The correct answer is (D) Chlorine.
Match the following:

Choose the correct pair from the following:

Identify A, B, C plants in a series based on these characters of roots:
A. Roots at lower nodes of stem
B. Roots absorb water and food from host plant
C. Root forming nodules
Assertion (A): Light harvesting complexes made up of many pigments bound to proteins and are called antennae.
Reason (R): Antennae absorb different wavelengths of light.
Assertion [A]: Genetic variability is the root of any breeding programme.
Reason [R]: The entire collection of plants or seeds having all the diverse alleles for all genes in a given crop is called germ plasm collection.