Blossom end rot in tomato is caused by the deficiency of

Answer: Option B

Blossom end rot in tomatoes is caused by the deficiency of Calcium.
Blossom end rot is a physiological disease caused by a localized deficiency of calcium in the fruit.
Calcium is a nutrient that is required in relatively large quantities by rapidly growing fruit, especially by those cells at the blossom end of the young fruit.