Which of the following are incorrect as a criterion for the essentiality of an element .
i. If the concerned element is deficient another element can fulfil the need of it
ii. The plants would complete their life cycle irrespective of the absence of deficiency of the elements.
iii. The elements have indirect involvement in the metabolism of plants .
iv.The elements must be absolutely necessary for supporting normal growth and reproduction.
(a) i ,ii ,iii ,iv
(b) i,ii
(c) i, ii, iii
(d) ii , iii

Options

A. i ,ii ,iii ,iv
B. i,ii
C. i, ii, iii
D. ii , iii

Answer

To solve the question regarding the incorrect criteria for the essentiality of an element in plants, we will analyze each statement provided:

1. **Statement i**: "If the concerned element is deficient, another element can fulfill the need of it."
- This statement is incorrect. According to the criteria for essentiality, each element is indispensable for plant growth and cannot be replaced by another element. If an essential element is deficient, it cannot be substituted by another element.

2. **Statement ii**: "The plants would complete their life cycle irrespective of the absence of deficiency of the elements."
- This statement is also incorrect. Essential elements are crucial for the completion of a plant's life cycle. If an essential element is absent, the plant will not be able to complete its life cycle.

3. **Statement iii**: "The elements have indirect involvement in the metabolism of plants."
- This statement is incorrect as well. Essential elements are directly involved in the metabolism of plants. They play critical roles in various metabolic processes, and their absence can lead to metabolic disorders.

4. **Statement iv**: "The elements must be absolutely necessary for supporting normal growth and reproduction."
- This statement is correct. Essential elements are indeed necessary for normal growth and reproduction in plants.

Based on the analysis, the incorrect statements are i, ii, and iii. Therefore, the correct answer is:

**(c) i, ii, iii**