India's manufacturing sector growth started the year 2025 on a strong footing and touched a six-month high in January, fuelled by the steepest upturn in exports in nearly 14 years, a monthly survey said on Monday.The seasonally adjusted HSBC India Manufacturing Purchasing Managers' Index (PMI) rose from December's one-year low of 56.4 to 57.7 in January supported by the fastest upturn in new export orders since February 2011.