HONG KONG—China’s market regulator said Monday it has launched a probe into suspected monopolistic behavior by food delivery firm Meituan. The investigation comes amid increased scrutiny of internet companies suspected of anti-competitive practices. The State Administration for Market Regulation said in a statement that it was looking into Meituan’s policies, including exclusivity arrangements known as “pick one of two.” Such practices are common in China, where e-commerce providers sometimes force merchants to exclusively sell their goods and services on just their internet platform. Meituan, which competes with Alibaba’s Ele.me food delivery platform in China, said in a statement posted on the microblogging platform Weibo that it will actively cooperate with authorities to improve compliance and protect consumers’ rights. The company’s various businesses were “operating normally,” it said. The probe into Meituan follows an investigation of Alibaba, China’s biggest e-commerce company, last year for anti-competitive practices. Regulators fined Alibaba a record …