Classification – Odd one out (Indian heads of state vs heads of government): Choose the outlier: Indra Gandhi, Lal Bahadur Shastri, Jawahar Lal Nehru, Dr Rajendra Prasad.

Introduction / Context:
In Indian political history, a sharp distinction exists between the President (head of state) and the Prime Minister (head of government). Among the four names listed, three served as Prime Ministers, while one was the first President of India—providing a definitive 3-to-1 split.

Given Data / Assumptions:

• Indira Gandhi (spelled here as Indra Gandhi): Prime Minister (1966–1977, 1980–1984).
• Lal Bahadur Shastri: Prime Minister (1964–1966).
• Jawaharlal Nehru (spelled here as Jawahar Lal Nehru): Prime Minister (1947–1964).
• Dr. Rajendra Prasad: first President of India (1950–1962).

Concept / Approach:
Classify each leader by constitutional role. The sole President among three Prime Ministers is the odd one out.

Step-by-Step Solution:
Nehru → Prime Minister.Shastri → Prime Minister.Indira Gandhi → Prime Minister.Dr. Rajendra Prasad → President.

Verification / Alternative check:
Alternate criteria (party, era) would not yield a single unique member as cleanly as constitutional role does.

Why Other Options Are Wrong:

• Indira Gandhi, Lal Bahadur Shastri, and Jawaharlal Nehru all served as Prime Ministers.

Common Pitfalls:
Letting spelling variants distract from the substantive roles; the roles themselves are unambiguous.

Final Answer:
Dr Rajendra Prasad