Blotchy ripening in tomato is caused by:

Correct option is C

Blotchy ripening in tomato is primarily caused by Potassium (K) deficiency, which affects the uniform ripening of fruits.

(a) Nitrogen deficiency: Leads to stunted growth and pale leaves.
(b) Phosphorus deficiency: Causes poor root development.
(d) Calcium deficiency: Causes blossom end rot.
Important Point: Adequate potassium improves fruit quality, color, and disease resistance.