Statement (a) is correct; e-sahathi is a consent- based data sharing platform where individuals (data holders) can provide consent for their data to be shared securely with other agencies for specific purposes, adhering to data governance principles. Statement (b) is correct; such government digital platforms are typically developed by state e-Governance departments in collaboration with technical partners like the National Informatics Centre (NIC). Statement (c) is incorrect; while the government acts as a Data Fiduciary (or custodian) for data collected for public purposes, the e-sahathi framework is based on citizen consent for data sharing, not government selling personal data to private agencies for revenue. This contradicts privacy principles. Statement (d) is incorrect; monetization of citizen's data by selling it is not the purpose of e- sahathi or similar consent frameworks. Therefore, statements (c) and (d) are incorrect. The question asks how many statements are incorrect; two statements are incorrect.