The deputy of Tehsildar is known as:

In the administrative hierarchy of land revenue, the Tehsildar is a key official responsible for land records and revenue collection at the tehsil level. The deputy of a Tehsildar is officially known as a Naib Tehsildar. This position assists the Tehsildar in their duties and often handles specific sub-divisions or tasks. Option A, Board of Revenue, is a much higher administrative body. Option B, Executive revenue, is a descriptive term and not an official designation. Therefore, 'Naib Tehsildar' is the correct and specific title for the deputy of a Tehsildar, reflecting the structured administrative roles within the land revenue department.