The oldest civilization of Pakistan?

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A. Mohen-Jo-Daro
B. Harrapan civilization
C. Ghandara Civilization
D. Indus civilization 

Explanation:

An overview of the Indus civilization. The civilization was first identified in 1921 at Harappa in the Punjab region and then in 1922 at Mohenjo-daro (Mohenjodaro), near the Indus River in the Sindh (Sind) region. Both sites are in present-day Pakistan, in Punjab and Sindh provinces, respectively.