Match List-I with List-II:

List-I (Discover)	List-II (Scientist)
A. Nutrient essentiality criteria	(I) Y.L. Nene
B. Stages of cell	(II) Arnon and Stout
C. Cell	(III) Robert Hooke
D. Khaira disease	(IV) Walther Fleming

Choose the correct answer from the options given below:
(a) [a]-(I), [b]-(II), [c]-(III), [d]-(IV)
(b) [a]-(I), [b]-(II), [c]-(III), [d]-(IV)
(c) [a]-(I), [b]-(II), [c]-(IV), [d]-(III)
(d) [a]-(II), [b]-(IV), [c]-(III), [d]-(I)

Correct option is D

✅ Correct matching: Option (d)
[a]-(II), [b]-(IV), [c]-(III), [d]-(I)
Explanation of correct pairs:
· (a) Nutrient essentiality criteria → Arnon and Stout (II)
· They proposed the criteria for essentiality of mineral nutrients in plants.
· Widely accepted foundation in plant nutrition.
· (b) Stages of cell → Walther Fleming (IV)
· Walther Fleming described mitosis and identified the stages of cell division.
· Coined the term mitosis.
· (c) Cell → Robert Hooke (III)
· Discovered and named the cell while observing cork under a microscope (1665).
· (d) Khaira disease → Y.L. Nene (I)
· Identified Khaira disease of rice.
· Established it as a zinc deficiency disorder.
➡️ Hence, option (d) is correct as given in the image.
❌ Why other options are incorrect
· Options (a) & (b):
· Incorrect association of nutrient essentiality and stages of cell.
· Option (c):
· Walther Fleming is not associated with cell discovery; that was Robert Hooke.
�� Key Points to Remember
· Arnon & Stout → Nutrient essentiality criteria
· Walther Fleming → Stages of cell (mitosis)
· Robert Hooke → Discovery of cell
· Y.L. Nene → Khaira disease (Zn deficiency in rice)