If the question did not specifically put conditions, then answering that is a straightforward one.
Having said that, answering Yes does not mean you meet the conditions automatically. It is your responsibility to confirm that the eligibility is met.
Immigration rules (https://www.gov.uk/guidance/immigration ... endix-koll
) set the requirements as follows:
(b) the applicant-
(i) has limited leave to enter or remain in the UK, and
(ii) that leave (or a grant of leave which preceded it provided any periods of leave since have been unbroken) was given on the basis that the applicant had an English language qualification at a minimum level of B1 on the Common European Framework of Reference for Languages.
(iii) at the date of application, the provider of that qualification continues to be approved by the Secretary of State.
1) your dependant should not have had any break in leave since the Tier4
2) the qualification used at that time should still be on the approved list now.
My comments are in no way meant to be advisory. I have no professional knowledge of immigration. These are based on my own experience, convictions and personal interpretation of publicly available information.