Explanation:
Presidential Election Process (Article 41):

The President is elected by an Electoral College comprising:

Senate (Upper House of Parliament)

National Assembly (Lower House)

Provincial Assemblies (All four provinces: Punjab, Sindh, KPK, Balochistan)

Why Other Options Are Incorrect:

B. National Assembly Alone: Too limited (excludes Senate and Provinces)

C. Senate Alone: Incorrect (National Assembly and Provinces also vote)

D. Senate + National Assembly: Partial answer (misses Provincial Assemblies)

Key Constitutional Details:

Voting Weight:

National Assembly + Senate: 1 vote per member

Provincial Assemblies: Each member's vote counts as proportional to their province's population

Term: 5 years (re-electable once)

Impeachment: Requires 2/3 majority of Parliament (Article 47)

Historical Context:
This system ensures federal representation—smaller provinces (like Balochistan) have a voice through their assemblies, balancing the National Assembly's population-based dominance.

Example: In the 2018 election, Arif Alvi won with votes from all three components of the Electoral College.

Did You Know? Pakistan's President is largely a ceremonial figure; real executive power lies with the Prime Minister under the 1973 Constitution.