Arrange the following Presidents of India in chronological order (earliest to latest): a) Dr. S. Radhakrishnan b) Dr. Rajendra Prasad c) Giani Zail Singh d) V. V. Giri e) Dr. A. P. J. Abdul Kalam

Introduction / Context:
This item checks general knowledge of the chronological order of selected Presidents of India.

Given Data / Assumptions:

• Dr. Rajendra Prasad served 1950–1962.
• Dr. S. Radhakrishnan served 1962–1967.
• V. V. Giri served 1969–1974.
• Giani Zail Singh served 1982–1987.
• Dr. A. P. J. Abdul Kalam served 2002–2007.

Concept / Approach:
Place each leader on a time axis from earliest term start to latest.

Step-by-Step Solution:
1) Rajendra Prasad (b).2) S. Radhakrishnan (a).3) V. V. Giri (d).4) Giani Zail Singh (c).5) A. P. J. Abdul Kalam (e).

Verification / Alternative check:
Official records and standard GK references confirm the same order.

Why Other Options Are Wrong:
Options that position Kalam before Zail Singh or Giri violate timeline continuity.

Common Pitfalls:
Confusing acting presidents or partial terms; the names given refer to principal elected terms.

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