Indian Presidents — arrange chronologically (earliest to latest) Names: a. S. Radhakrishnan b. Rajendra Prasad c. Giani Zail Singh d. V.V. Giri e. A.P.J. Abdul Kalam

Introduction / Context:
The task is to order the listed Presidents of India by term chronology.

Given Data / Assumptions:
Approximate terms: Rajendra Prasad (1950–1962), S. Radhakrishnan (1962–1967), V.V. Giri (1969–1974), Giani Zail Singh (1982–1987), A.P.J. Abdul Kalam (2002–2007).

Concept / Approach:
Sort by starting years.

Step-by-Step Solution:
Earliest to latest: Rajendra Prasad → S. Radhakrishnan → V.V. Giri → Giani Zail Singh → A.P.J. Abdul Kalam.

Why Other Options Are Wrong:
They swap mid/late 20th century presidencies or place A.P.J. Abdul Kalam earlier than 1980s heads of state.

Final Answer:
b, a, d, c, e