Do you think MCV test is enough to determine the risk of Thalasimia (pre- marriage test)?

No it is not enough. I think the genetic tests is fine to identify the same. Doctors diagnose thalassemias using blood tests, including a complete blood count (CBC) and special hemoglobin tests.

No, this require more testings like hemoglobin electrophoresis and gene sequencing to detect related mutations.

No it is not enough, they need to do electrophoresis or genetic tests. 

No,should confirm by Hb electrophorsis

Hb, MCV, MCH, TRBC and RDW are interpreted together for risk of Thalassemia trait

No, Peripheral Blood Smear required