Step 1: Identify the horticultural variety.
"Allahabad Safeda" is one of the most famous and commercially grown varieties of guava in India. It has round shape, whitish pulp, and excellent keeping quality.
Step 2: Eliminate other crops.
(A) Banana – no such variety exists.
(C) Papaya – varieties are Pusa Delicious, Pusa Dwarf, etc.
(D) Mango – famous varieties include Alphonso, Dasheri, Langra, not Safeda.
Step 3: Conclusion.
Thus, "Allahabad Safeda" is a variety of Guava.