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July 29 (Reuters) - Merck & Co Inc reported a 1 percent rise in quarterly revenue, driven by higher sales of its cancer drug, Keytruda.

Net income soared to $1.21 billion, or 43 cents per share, in the second quarter, from $688 million, or 24 cents per share, a year earlier.

The company's revenue rose to $9.84 billion from $9.79 billion.

(Reporting by Ankur Banerjee in Bengaluru; Editing by Maju Samuel)