Based on the reference provided, it's impossible to definitively name one single "friend" of Pakistan. Instead, Pakistan maintains important foreign relations with multiple countries.
The reference highlights:
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Strong relationships: Iran, Turkey, Saudi Arabia, and China are important partners due to extensive cooperation in national security and economic interests.
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Wide-ranging relations: Bilateral relations with the United States and other Western countries are also significant.
Therefore, rather than a single friend, Pakistan has a network of important relationships based on shared interests.
